If F(x)=∫1x1tdtF(x) = \int_{1}^{x} \frac{1}{t} dtF(x)=∫1xt1dt, what is F′(x)F'(x)F′(x)?
ln∣x∣\ln|x|ln∣x∣
1x\frac{1}{x}x1
xxx
ln∣x∣−1\ln|x| - 1ln∣x∣−1