If f(x)=(1+3e^x)^4 ,then find f'(x) Answer instructions 4(1+3e^x)^3 4(1+3e^x)^3(3e^x) (1+3e^x)^3 12e^4x

The correct answer is .This is obtained by applying the chain rule to the function . The derivative is found by differentiating the outer function with respect to the inner function, and then multiplying by the derivative of the inner function.