Here's the question you clicked on:
amorfide
is anyone able to do a quick lesson on integration by parts?
let \( u \) and \(v\) be two functions of x, \[ \int u(x) \; v(x) \;dx = u(x) \int v(x) dx - \int {d\over dx}u(x) \left [ \int v(x) dx \right ] dx \\= v(x) \int u(x) dx - \int {d\over dx}v(x) \left [ \int u(x) dx \right ] dx\] Rest is pratice!!
|dw:1350493812184:dw| is that the integral of the derivative of v(x)? lol
try few examples |dw:1350493861755:dw|
yeah ... but that is multiplied by another integral ... and dx appears at last.
|dw:1350494046804:dw|
so in words it would be (second x integral of first) - (integral of (derivative of second x integral of first))
yep .. you can interchange first and second though. suit yourself according to the problem.