Question

integral from 1 to 2 1/(x(lnx))

Answer 1

\[\int\limits_{1}^{2} 1/(xln(x)) dx\]

\[\int\limits_{1}^{2} (1/x) (1/ln(x)) dx\]
\[u=\ln(x)\]
\[du=(1/x)dx\]
\[\int\limits_{0}^{ln(2)} (1/u) du\]
\[\int\limits_{0}^{ln(2)}u ^{-1}du\]

Think you got it from there?

Answer 2

I found something weird...