CalculusSuperchallengeThe Derivative ShareThe Derivative · Superchallenge problemLet g(x)=f(x)+6g(x) = f(x) + 6g(x)=f(x)+6 where f′(15)=21f'(15) = 21f′(15)=21. What is g′(15)g'(15)g′(15)?Check Show answer Walk through it step by step Practice more like this Review this concept