Featured Original PDF
Featured Original PDF
SURDS AND INDICES I IMPORTANT FACTS AND FORMULAE I LAWS OF INDICES: am x an = am + n am / an = am-n (am)n = amn (ab)n = anbn ( a/ b )n = ( an / bn ) a0 = 1 SURDS: Let a be a rational number and n […]
PROBLEMS ON AGES Ex. 1. Rajeev’s age after 15 years will be 5 times his age 5 years back. What is the present age of Rajeev ? (Hotel Management,2002) Sol. Let Rajeev’s present age be x years. Then, Rajeev’s age after 15 years = (x + 15) years. Rajeev’s age […]
SQUARE ROOTS AND CUBE ROOTS IMPORTANT FACTS AND FORMULAE Square Root: If x2 = y, we say that the square root of y is x and we write, √y = x. Thus, √4 = 2, √9 = 3, √196 = 14. Cube Root: The cube root of a given number x is the number whose […]
SIMPLIFICATION IMPORTANT CONCEPTS ’BODMAS’Rule: This rule depicts the correct sequence in which the operations are to be executed,so as to find out the value of a given expression. Here, ‘B’ stands for ’bracket’ ,’O’for ‘of’ , ‘D’ for’ division’ and ‘M’ for ‘multiplication’, ‘A’ for ‘addition’ and ‘S’ for ‘subtraction’. Thus, in simplifying an expression, […]