Example of an even function that's one-to-one ,(f is a function from R to R).

Answer 1

Not possible. An even function says f(-x) = f(x) and that means there would be two values of "x" that would yield the same function value. The function evaluated at "x" would be f(x) and f(-x) would also be f(x) meaning it is not one-to-one.