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Ex 1.2 , 4 - Chapter 1 Class 12 Relation and Functions (Term 1)
Last updated at May 29, 2018 by Teachoo
Ex 1.2
Ex 1.2, 1
Ex 1.2, 2 (i) Important
Ex 1.2, 2 (ii) Important
Ex 1.2, 2 (iii)
Ex 1.2, 2 (iv)
Ex 1.2, 2 (v) Important
Ex 1.2 , 3
Ex 1.2 , 4 You are here
Ex 1.2, 5 Important
Ex 1.2 , 6 Important
Ex 1.2, 7 (i)
Ex 1.2, 7 (ii)
Ex 1.2 , 8 Important
Ex 1.2 , 9
Ex 1.2 , 10 Important
Ex 1.2 , 11 (MCQ) Important
Ex 1.2, 12 (MCQ)
Chapter 1 Class 12 Relation and Functions
Serial order wise
Transcript
Ex 1.2 , 4 Show that the Modulus Function f: R R given by f(x) = , is neither one-one nor onto, where is x, if x is positive or 0 and is x, if x is negative. f(x) = = , 0 , <0 Check one-one For example: f (1) = 1 = 1 f ( 1) = 1 = 1 Check onto f: R R f(x) = Let f(x) = y such that y R y = Hence value of y is defined only if y is positive, But y is a real number Hence, if y is negative, there is not corresponding element of x Hence, f is not onto
