題目 2. (10 points) Define f(x)=tan2(x)f(x)=\tan^2(x)f(x)=tan2(x) for x∈(0,π2)x\in\left(0,\dfrac{\pi}{2}\right)x∈(0,2π) and let f−1f^{-1}f−1 be its inverse function. Find (f−1)′(3)(f^{-1})'(3)(f−1)′(3). 解答
