Question

For the function f(X) = x^2 -12, find (f o f -^1)(4) A. 6 B. 10 C. 4 D. 0

Answer 1

Easy

we know that a function composed of it's inverse leaves x
basically
(f o f⁻¹)(x)=x

so

(f o f⁻¹)(4)=4

answer is C