JEE Main 2020 Mathematics question
Let f and g be differentiable functions on R such that fog is the identity function. If for some a, , g'(a) = 5 and g(a) = b, then f'(b) is equal to -
Answer: (A)
Let f and g be differentiable functions on R such that fog is the identity function. If for some a, , g'(a) = 5 and g(a) = b, then f'(b) is equal to -