Question

Which of the following functions are onto function if f : R ->R (a) f x 115x 49 (b) f x=|x|

Answer 1

onto function which codomain=range f(x)=115x^49
this function range€R
also given codomain €R
hence this is an onto function.

(2) f(x)=|x|
this function range€[0,infinity)
but codomain€R
so, this is not into function.