Question

Let f(x)=10x-10 find the value of (fof^-1)(-10)

Answer 1

(f o f^-1 (10)) = 10

Explanation:

f ^ -1 = (x + 10)/10

from solving from f(x) = 10x - 10

since 10x - 10 is a one-to-one function it has an inverse

so f o f^-1 (x) = x

(f o f^-1 (10)) = 10