# help with integral by parts

• March 11th 2010, 02:27 PM
stache31
help with integral by parts
• March 11th 2010, 02:32 PM
e^(i*pi)
Quote:
$u' = \frac{1}{x}$

$v = \frac{46}{3}x^3$

$\int u\,dv = uv - \int v\,du$

Your integral is therefore equal to

$\frac{46}{3}x^3 \cdot \ln(x) - \int \left(\frac{46}{3}x^3 \cdot \frac{1}{x}\right)\,dx$

Use algebra to simplify the term inside the brackets, then evaluate the integral which is a standard power rule one
• March 11th 2010, 02:38 PM
stache31
thanks man. also, rammstein is awesome!