Question: what is the inverse of the function below f(x)=2x+6?
Answer: Since g(f(x))=x g ( f ( x ) ) = x , f−1(x)=x2+3 f - 1 ( x ) = x 2 + 3 is the inverse of f(x)=2x−6 f ( x ) = 2 x - 6 .