Question

How do I solve this? For the function f(x)=(2-5x)^2, find f^-1. Determine whether f^-1 is a function

Answer 1

unless f is a one-to-one function, the inverse will not be a function. to find the inverse, simply exchange x and y in your original function and solve for y. this will yield the inverse.

Answer 2

a function is a one-to-one function if it passes both the vertical and horizontal line tests.