Problemddx(1x)\frac{d}{dx}\bigl(\tfrac{1}{x}\bigr)dxd(x1)Step-by-step solution改寫成冪的形式:1x=x−1\frac{1}{x} = x^{-1}x1=x−1。以 n=−1n = -1n=−1 套用冪法則:ddx(x−1)=(−1)x−2\frac{d}{dx}(x^{-1}) = (-1) x^{-2}dxd(x−1)=(−1)x−2。再寫回分數形式:−1x2-\frac{1}{x^2}−x21。Answer−1x2-\frac{1}{x^2}−x21Want to solve a different problem? Open the derivative solver →Related worked examples/solve/calculus/derivative-of-ln-x