Question: what is the inverse of a function f(x)=2x-10?
Answer: Since g(f(x))=x g ( f ( x ) ) = x , f−1(x)=−x2+5 f - 1 ( x ) = - x 2 + 5 is the inverse of f(x)=−2x+10 f ( x ) = - 2 x + 10 .