1. ## integrate ln

$
\int ln(y)dy
$

wondering how i would integrate this

2. Originally Posted by jvignacio
$
\int ln(y)dy
$

wondering how i would integrate this
This would be integrated by parts:

Let $u=\ln(y)$ and $\,dv=\,dy$

See how far you can get with this

--Chris

3. $u = \ln (x)$
$dv = dx$

according to the formula of itegrating by parts:

$\color{blue}\boxed{\int udv = uv - \int vdu}$

$= x\ln (x) - \int x(\frac {1}{x})dx$
$x\ln (x) - x + c$

4. Originally Posted by toraj58
$u = \ln (x)$
$dv = dx$

according to the formula of itegrating by parts:

$\color{blue}\boxed{\int udv = uv - \int vdu}$

$= x\ln (x) - \int x(\frac {1}{x})dx$
$x\ln (x) - x + c$
thanks mate