{"id":3062,"date":"2025-06-07T09:23:57","date_gmt":"2025-06-07T09:23:57","guid":{"rendered":"https:\/\/diznr.com\/?p=3062"},"modified":"2025-06-07T09:23:57","modified_gmt":"2025-06-07T09:23:57","slug":"discrete-mathematics-gate-question-gate-2020-equivalence-class-a-relation-r-is-defined-on-set-the","status":"publish","type":"post","link":"https:\/\/www.reilsolar.com\/pdf\/discrete-mathematics-gate-question-gate-2020-equivalence-class-a-relation-r-is-defined-on-set-the\/","title":{"rendered":"Discrete Mathematics Gate Question-GATE 2025 equivalence class A relation R is defined on the set"},"content":{"rendered":"<p>Discrete Mathematics Gate Question-GATE 2025 equivalence class A relation R is defined on the set<\/p>\n<p>[fvplayer id=&#8221;233&#8243;]<\/p>\n<p data-start=\"0\" data-end=\"212\">It looks like you&#8217;re looking for a <strong data-start=\"35\" data-end=\"69\">GATE 2025 Discrete Mathematics<\/strong> question related to <strong data-start=\"90\" data-end=\"113\">Equivalence Classes<\/strong> and <strong data-start=\"118\" data-end=\"131\">Relations<\/strong>. Here\u2019s a general breakdown to help you understand how to solve such problems.<\/p>\n<h3 data-start=\"219\" data-end=\"270\"><strong data-start=\"222\" data-end=\"268\">\u00a0Equivalence Class &amp; Relation Definition<\/strong><\/h3>\n<p data-start=\"271\" data-end=\"534\">A relation <strong data-start=\"282\" data-end=\"287\">R<\/strong> on a set <strong data-start=\"297\" data-end=\"302\">S<\/strong> is an <strong data-start=\"309\" data-end=\"333\">equivalence relation<\/strong> if it satisfies three properties:<br data-start=\"367\" data-end=\"370\" \/><strong data-start=\"372\" data-end=\"387\">Reflexivity<\/strong>: <span class=\"katex\"><span class=\"katex-mathml\">aRaaRa<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">a<\/span><\/span><\/span><\/span> for all <span class=\"katex\"><span class=\"katex-mathml\">a\u2208Sa \\in S<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2208<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">S<\/span><\/span><\/span><\/span><br data-start=\"420\" data-end=\"423\" \/><strong data-start=\"425\" data-end=\"437\">Symmetry<\/strong>: If <span class=\"katex\"><span class=\"katex-mathml\">aRbaRb<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span>, then <span class=\"katex\"><span class=\"katex-mathml\">bRabRa<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">a<\/span><\/span><\/span><\/span><br data-start=\"467\" data-end=\"470\" \/><strong data-start=\"472\" data-end=\"488\">Transitivity<\/strong>: If <span class=\"katex\"><span class=\"katex-mathml\">aRbaRb<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span> and <span class=\"katex\"><span class=\"katex-mathml\">bRcbRc<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">c<\/span><\/span><\/span><\/span>, then <span class=\"katex\"><span class=\"katex-mathml\">aRcaRc<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">c<\/span><\/span><\/span><\/span><\/p>\n<p data-start=\"536\" data-end=\"652\">If a relation <strong data-start=\"550\" data-end=\"555\">R<\/strong> is an <strong data-start=\"562\" data-end=\"586\">equivalence relation<\/strong>, then the <strong data-start=\"597\" data-end=\"618\">equivalence class<\/strong> of an element <strong data-start=\"633\" data-end=\"638\">a<\/strong> is the set:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">[a]={x\u2208S\u2223xRa}[a] = \\{ x \\in S \\mid xRa \\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mopen\">[<\/span><span class=\"mord mathnormal\">a<\/span><span class=\"mclose\">]<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord mathnormal\">x<\/span><span class=\"mrel\">\u2208<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">S<\/span><span class=\"mrel\">\u2223<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">x<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">a<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span><\/span><\/p>\n<p data-start=\"688\" data-end=\"774\">This means all elements in an equivalence class are <strong data-start=\"740\" data-end=\"773\">related to each other under R<\/strong>.<\/p>\n<h3 data-start=\"781\" data-end=\"813\"><strong data-start=\"784\" data-end=\"813\">\u00a0Example GATE Question:<\/strong><\/h3>\n<p data-start=\"814\" data-end=\"882\">Let <span class=\"katex\"><span class=\"katex-mathml\">S={1,2,3,4,5,6}S = \\{1, 2, 3, 4, 5, 6\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">S<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">1<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">2<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">3<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">4<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">5<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">6<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span> and define a relation <strong data-start=\"871\" data-end=\"876\">R<\/strong> as:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">aRb\u2005\u200a\u27fa\u2005\u200aa\u2261b(mod3)aRb \\iff a \\equiv b \\pmod{3}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">b<\/span><span class=\"mrel\">\u27fa<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><\/span><span class=\"base\"><span class=\"mopen\">(<\/span><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span><\/span><\/p>\n<p data-start=\"918\" data-end=\"1000\">(i.e., <strong data-start=\"925\" data-end=\"996\">a is related to b if they have the same remainder when divided by 3<\/strong>).<\/p>\n<h3 data-start=\"1002\" data-end=\"1042\"><strong data-start=\"1006\" data-end=\"1042\">\u00a0Find the Equivalence Classes:<\/strong><\/h3>\n<p data-start=\"1043\" data-end=\"1071\">We check numbers modulo 3:<\/p>\n<ul data-start=\"1072\" data-end=\"1284\">\n<li data-start=\"1072\" data-end=\"1142\"><strong data-start=\"1074\" data-end=\"1081\">[1]<\/strong> = {1, 4} (since <span class=\"katex\"><span class=\"katex-mathml\">1mod\u2009\u20093=11 \\mod 3 = 1<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">1<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">1<\/span><\/span><\/span><\/span> and <span class=\"katex\"><span class=\"katex-mathml\">4mod\u2009\u20093=14 \\mod 3 = 1<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">4<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">1<\/span><\/span><\/span><\/span>)<\/li>\n<li data-start=\"1143\" data-end=\"1213\"><strong data-start=\"1145\" data-end=\"1152\">[2]<\/strong> = {2, 5} (since <span class=\"katex\"><span class=\"katex-mathml\">2mod\u2009\u20093=22 \\mod 3 = 2<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">2<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">2<\/span><\/span><\/span><\/span> and <span class=\"katex\"><span class=\"katex-mathml\">5mod\u2009\u20093=25 \\mod 3 = 2<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">5<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">2<\/span><\/span><\/span><\/span>)<\/li>\n<li data-start=\"1214\" data-end=\"1284\"><strong data-start=\"1216\" data-end=\"1223\">[3]<\/strong> = {3, 6} (since <span class=\"katex\"><span class=\"katex-mathml\">3mod\u2009\u20093=03 \\mod 3 = 0<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">3<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">0<\/span><\/span><\/span><\/span> and <span class=\"katex\"><span class=\"katex-mathml\">6mod\u2009\u20093=06 \\mod 3 = 0<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">6<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">0<\/span><\/span><\/span><\/span>)<\/li>\n<\/ul>\n<p data-start=\"1286\" data-end=\"1361\"><strong data-start=\"1288\" data-end=\"1305\">Final Answer:<\/strong> The equivalence classes are <strong data-start=\"1334\" data-end=\"1360\">{1, 4}, {2, 5}, {3, 6}<\/strong>.<\/p>\n<h3 data-start=\"1368\" data-end=\"1414\"><strong data-start=\"1371\" data-end=\"1414\">\u00a0How to Solve Similar GATE Questions?<\/strong><\/h3>\n<p data-start=\"1415\" data-end=\"1655\"><strong data-start=\"1419\" data-end=\"1468\">Check Reflexivity, Symmetry, and Transitivity<\/strong> to confirm <strong data-start=\"1480\" data-end=\"1512\">R is an equivalence relation<\/strong>.<br data-start=\"1513\" data-end=\"1516\" \/><strong data-start=\"1520\" data-end=\"1554\">Find elements that are related<\/strong> to each other based on the given rule.<br data-start=\"1593\" data-end=\"1596\" \/><strong data-start=\"1600\" data-end=\"1652\">Group elements into disjoint equivalence classes<\/strong>.<\/p>\n<p data-start=\"1657\" data-end=\"1749\" data-is-last-node=\"\" data-is-only-node=\"\">\u00a0<strong data-start=\"1660\" data-end=\"1749\" data-is-last-node=\"\">Want me to solve a specific GATE 2025 question for you? Share the full question!<\/strong><\/p>\n<h3 data-start=\"1657\" data-end=\"1749\"><a href=\"https:\/\/www.math.cmu.edu\/~mradclif\/teaching\/127S19\/Notes\/EquivalenceRelations.pdf\" target=\"_blank\" rel=\"noopener\">Discrete Mathematics Gate Question-GATE 2025 equivalence class A relation R is defined on the set<\/a><\/h3>\n<h3 class=\"LC20lb MBeuO DKV0Md\"><a href=\"https:\/\/www2.cs.uh.edu\/~arjun\/courses\/ds\/DiscMaths4CompSc.pdf\" target=\"_blank\" rel=\"noopener\">Discrete Mathematics for Computer Science<\/a><\/h3>\n<p data-start=\"0\" data-end=\"169\">Let\u2019s break down and solve a <strong data-start=\"29\" data-end=\"73\">GATE-style Discrete Mathematics question<\/strong> related to <strong data-start=\"85\" data-end=\"134\">equivalence relations and equivalence classes<\/strong>, as might appear in <strong data-start=\"155\" data-end=\"168\">GATE 2025<\/strong>:<\/p>\n<hr data-start=\"171\" data-end=\"174\" \/>\n<h3 data-start=\"176\" data-end=\"239\">\ud83e\uddee <strong data-start=\"183\" data-end=\"239\">\ud83d\udccc Topic: Equivalence Class and Equivalence Relation<\/strong><\/h3>\n<blockquote data-start=\"241\" data-end=\"656\">\n<p data-start=\"243\" data-end=\"356\"><strong data-start=\"243\" data-end=\"272\">Question (Sample Format):<\/strong><br data-start=\"272\" data-end=\"275\" \/>Let <span class=\"katex\"><span class=\"katex-mathml\">RR<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">R<\/span><\/span><\/span><\/span> be a relation on the set <span class=\"katex\"><span class=\"katex-mathml\">A={1,2,3,4,5,6}A = \\{1, 2, 3, 4, 5, 6\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">1<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">2<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">3<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">4<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">5<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">6<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span> defined as:<\/p>\n<p data-start=\"363\" data-end=\"417\"><span class=\"katex\"><span class=\"katex-mathml\">a\u2009R\u2009b\u2005\u200a\u27fa\u2005\u200aa\u2261b\u00a0(mod\u00a03)a \\, R \\, b \\iff a \\equiv b \\ (\\text{mod } 3)<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mord mathnormal\">b<\/span><span class=\"mrel\">\u27fa<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><span class=\"mspace\">\u00a0<\/span><span class=\"mopen\">(<\/span><span class=\"mord text\"><span class=\"mord\">mod\u00a0<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span>.<\/p>\n<p data-start=\"424\" data-end=\"570\"><strong data-start=\"424\" data-end=\"430\">a)<\/strong> Prove that <span class=\"katex\"><span class=\"katex-mathml\">RR<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">R<\/span><\/span><\/span><\/span> is an equivalence relation.<br data-start=\"477\" data-end=\"480\" \/><strong data-start=\"482\" data-end=\"488\">b)<\/strong> Find the <strong data-start=\"498\" data-end=\"521\">equivalence classes<\/strong> of the set <span class=\"katex\"><span class=\"katex-mathml\">AA<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><\/span><\/span><\/span> under the relation <span class=\"katex\"><span class=\"katex-mathml\">RR<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">R<\/span><\/span><\/span><\/span>.<\/p>\n<p data-start=\"577\" data-end=\"656\"><strong data-start=\"577\" data-end=\"611\">GATE-type MCQ style follow-up:<\/strong><br data-start=\"611\" data-end=\"614\" \/>How many equivalence classes are formed?<\/p>\n<\/blockquote>\n<hr data-start=\"658\" data-end=\"661\" \/>\n<h3 data-start=\"663\" data-end=\"694\">\u2705 <strong data-start=\"669\" data-end=\"694\">Step-by-step Solution<\/strong><\/h3>\n<h4 data-start=\"696\" data-end=\"748\">\ud83d\udd39 a) <strong data-start=\"707\" data-end=\"748\">Check if R is an Equivalence Relation<\/strong><\/h4>\n<p data-start=\"750\" data-end=\"809\">A relation <span class=\"katex\"><span class=\"katex-mathml\">RR<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">R<\/span><\/span><\/span><\/span> is an <strong data-start=\"775\" data-end=\"799\">equivalence relation<\/strong> if it is:<\/p>\n<ol data-start=\"811\" data-end=\"1046\">\n<li data-start=\"811\" data-end=\"879\">\n<p data-start=\"814\" data-end=\"879\"><strong data-start=\"814\" data-end=\"827\">Reflexive<\/strong>: <span class=\"katex\"><span class=\"katex-mathml\">a\u2261a\u00a0(mod\u00a03)a \\equiv a \\ (\\text{mod } 3)<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mspace\">\u00a0<\/span><span class=\"mopen\">(<\/span><span class=\"mord text\"><span class=\"mord\">mod\u00a0<\/span><\/span><span class=\"mord\">3<\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span> \u2013 Always true<\/p>\n<\/li>\n<li data-start=\"880\" data-end=\"949\">\n<p data-start=\"883\" data-end=\"949\"><strong data-start=\"883\" data-end=\"896\">Symmetric<\/strong>: If <span class=\"katex\"><span class=\"katex-mathml\">a\u2261ba \\equiv b<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span>, then <span class=\"katex\"><span class=\"katex-mathml\">b\u2261ab \\equiv a<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><\/span><\/span><\/span> \u2013 True<\/p>\n<\/li>\n<li data-start=\"950\" data-end=\"1046\">\n<p data-start=\"953\" data-end=\"1046\"><strong data-start=\"953\" data-end=\"967\">Transitive<\/strong>: If <span class=\"katex\"><span class=\"katex-mathml\">a\u2261ba \\equiv b<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span> and <span class=\"katex\"><span class=\"katex-mathml\">b\u2261cb \\equiv c<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">b<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">c<\/span><\/span><\/span><\/span>, then <span class=\"katex\"><span class=\"katex-mathml\">a\u2261ca \\equiv c<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><span class=\"mrel\">\u2261<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">c<\/span><\/span><\/span><\/span> \u2013 Also true<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"1048\" data-end=\"1090\">\u2705 Hence, <strong data-start=\"1057\" data-end=\"1089\">R is an equivalence relation<\/strong>.<\/p>\n<hr data-start=\"1092\" data-end=\"1095\" \/>\n<h4 data-start=\"1097\" data-end=\"1140\">\ud83d\udd39 b) <strong data-start=\"1108\" data-end=\"1140\">Find the Equivalence Classes<\/strong><\/h4>\n<p data-start=\"1142\" data-end=\"1229\">We calculate <span class=\"katex\"><span class=\"katex-mathml\">amod\u2009\u20093a \\mod 3<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">a<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathrm\">mod<\/span><\/span><span class=\"mord\">3<\/span><\/span><\/span><\/span> for each element in the set <span class=\"katex\"><span class=\"katex-mathml\">A={1,2,3,4,5,6}A = \\{1, 2, 3, 4, 5, 6\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">1<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">2<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">3<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">4<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">5<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">6<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span>:<\/p>\n<div class=\"_tableContainer_16hzy_1\">\n<div class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1231\" data-end=\"1541\">\n<thead data-start=\"1231\" data-end=\"1268\">\n<tr data-start=\"1231\" data-end=\"1268\">\n<th data-start=\"1231\" data-end=\"1241\" data-col-size=\"sm\">Element<\/th>\n<th data-start=\"1241\" data-end=\"1259\" data-col-size=\"sm\">Remainder mod 3<\/th>\n<th data-start=\"1259\" data-end=\"1268\" data-col-size=\"sm\">Group<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1308\" data-end=\"1541\">\n<tr data-start=\"1308\" data-end=\"1346\">\n<td data-start=\"1308\" data-end=\"1318\" data-col-size=\"sm\">1<\/td>\n<td data-start=\"1318\" data-end=\"1337\" data-col-size=\"sm\">1<\/td>\n<td data-col-size=\"sm\" data-start=\"1337\" data-end=\"1346\">[1]<\/td>\n<\/tr>\n<tr data-start=\"1347\" data-end=\"1385\">\n<td data-start=\"1347\" data-end=\"1357\" data-col-size=\"sm\">2<\/td>\n<td data-start=\"1357\" data-end=\"1376\" data-col-size=\"sm\">2<\/td>\n<td data-start=\"1376\" data-end=\"1385\" data-col-size=\"sm\">[2]<\/td>\n<\/tr>\n<tr data-start=\"1386\" data-end=\"1424\">\n<td data-start=\"1386\" data-end=\"1396\" data-col-size=\"sm\">3<\/td>\n<td data-start=\"1396\" data-end=\"1415\" data-col-size=\"sm\">0<\/td>\n<td data-start=\"1415\" data-end=\"1424\" data-col-size=\"sm\">[3]<\/td>\n<\/tr>\n<tr data-start=\"1425\" data-end=\"1463\">\n<td data-start=\"1425\" data-end=\"1435\" data-col-size=\"sm\">4<\/td>\n<td data-start=\"1435\" data-end=\"1454\" data-col-size=\"sm\">1<\/td>\n<td data-col-size=\"sm\" data-start=\"1454\" data-end=\"1463\">[1]<\/td>\n<\/tr>\n<tr data-start=\"1464\" data-end=\"1502\">\n<td data-start=\"1464\" data-end=\"1474\" data-col-size=\"sm\">5<\/td>\n<td data-start=\"1474\" data-end=\"1493\" data-col-size=\"sm\">2<\/td>\n<td data-start=\"1493\" data-end=\"1502\" data-col-size=\"sm\">[2]<\/td>\n<\/tr>\n<tr data-start=\"1503\" data-end=\"1541\">\n<td data-start=\"1503\" data-end=\"1513\" data-col-size=\"sm\">6<\/td>\n<td data-start=\"1513\" data-end=\"1532\" data-col-size=\"sm\">0<\/td>\n<td data-col-size=\"sm\" data-start=\"1532\" data-end=\"1541\">[3]<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"sticky end-(--thread-content-margin) h-0 self-end select-none\">\n<div class=\"absolute end-0 flex items-end\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p data-start=\"1543\" data-end=\"1579\">So, the <strong data-start=\"1551\" data-end=\"1574\">equivalence classes<\/strong> are:<\/p>\n<ul data-start=\"1581\" data-end=\"1649\">\n<li data-start=\"1581\" data-end=\"1603\">\n<p data-start=\"1583\" data-end=\"1603\"><span class=\"katex\"><span class=\"katex-mathml\">[0]={3,6}[0] = \\{3, 6\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mopen\">[<\/span><span class=\"mord\">0<\/span><span class=\"mclose\">]<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">3<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">6<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1604\" data-end=\"1626\">\n<p data-start=\"1606\" data-end=\"1626\"><span class=\"katex\"><span class=\"katex-mathml\">[1]={1,4}[1] = \\{1, 4\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mopen\">[<\/span><span class=\"mord\">1<\/span><span class=\"mclose\">]<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">1<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">4<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1627\" data-end=\"1649\">\n<p data-start=\"1629\" data-end=\"1649\"><span class=\"katex\"><span class=\"katex-mathml\">[2]={2,5}[2] = \\{2, 5\\}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mopen\">[<\/span><span class=\"mord\">2<\/span><span class=\"mclose\">]<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">{<\/span><span class=\"mord\">2<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">5<\/span><span class=\"mclose\">}<\/span><\/span><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1651\" data-end=\"1686\">\u2705 <strong data-start=\"1653\" data-end=\"1686\">Answer: 3 equivalence classes<\/strong><\/p>\n<hr data-start=\"1688\" data-end=\"1691\" \/>\n<h3 data-start=\"1693\" data-end=\"1731\">\ud83d\udccc Final Answer for GATE-type MCQ:<\/h3>\n<blockquote data-start=\"1732\" data-end=\"1800\">\n<p data-start=\"1734\" data-end=\"1800\"><strong data-start=\"1734\" data-end=\"1778\">How many equivalence classes are formed?<\/strong><br data-start=\"1778\" data-end=\"1781\" \/>\u2705 <strong data-start=\"1785\" data-end=\"1800\">Option C: 3<\/strong><\/p>\n<\/blockquote>\n<hr data-start=\"1802\" data-end=\"1805\" \/>\n<p data-start=\"1807\" data-end=\"1930\">Would you like more practice questions with <strong data-start=\"1851\" data-end=\"1876\">equivalence relations<\/strong>, <strong data-start=\"1878\" data-end=\"1892\">partitions<\/strong>, or <strong data-start=\"1897\" data-end=\"1915\">Hasse diagrams<\/strong> for GATE 2025?<\/p>\n<p data-start=\"1932\" data-end=\"1948\">I can also send:<\/p>\n<ul data-start=\"1949\" data-end=\"2004\">\n<li data-start=\"1949\" data-end=\"1964\">\n<p data-start=\"1951\" data-end=\"1964\">PDF worksheet<\/p>\n<\/li>\n<li data-start=\"1965\" data-end=\"1983\">\n<p data-start=\"1967\" data-end=\"1983\">Interactive quiz<\/p>\n<\/li>\n<li data-start=\"1984\" data-end=\"2004\">\n<p data-start=\"1986\" data-end=\"2004\">Concept video link<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2006\" data-end=\"2018\" data-is-last-node=\"\" data-is-only-node=\"\">Let me know!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discrete Mathematics Gate Question-GATE 2025 equivalence class A relation R is defined on the set [fvplayer id=&#8221;233&#8243;] It looks like you&#8217;re looking for a GATE 2025 Discrete Mathematics question related to Equivalence Classes and Relations. Here\u2019s a general breakdown to help you understand how to solve such problems. \u00a0Equivalence Class &amp; Relation Definition A relation [&hellip;]<\/p>\n","protected":false},"author":71,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-3062","post","type-post","status-publish","format-standard","hentry","category-discrete-mathematics"],"_links":{"self":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts\/3062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/users\/71"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/comments?post=3062"}],"version-history":[{"count":0,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/posts\/3062\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/media?parent=3062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/categories?post=3062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reilsolar.com\/pdf\/wp-json\/wp\/v2\/tags?post=3062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}