Use uuu-substitution to evaluate ∫lnxx dx\int \frac{\ln x}{x}\,dx∫xlnxdx.
(lnx)22+C\frac{(\ln x)^2}{2} + C2(lnx)2+C
ln(lnx)+C\ln(\ln x) + Cln(lnx)+C
1x+C\frac{1}{x} + Cx1+C
lnxx2+C\frac{\ln x}{x^2} + Cx2lnx+C