THE ANSWER TO THIS PROBLEM
IS
(C)
CONSIDER THE FUNCTION y=x
let f :R-->R be any function . define g :R-->R by g(x) = |f(x)| for all x. then g is
a. onto if f is onto
b. one=one if f is one-one
c.continuous if f is continuous
d. differentiable if f is defferentiable
any example of such a function ?