Question: what is the inverse of a function f(x)=1/4x-12?
Answer: Add x x and 0 0 . Since g(f(x))=x g ( f ( x ) ) = x , f−1(x)=4x+48 f - 1 ( x ) = 4 x + 48 is the inverse of f(x)=14x−12 f ( x ) = 1 4 x - 12 .