Question

i cant understood integration by parts in the definite integral.i dont know how can i choose u(du) or v(dv)..

Answer 1

You have an example by chance? Some are pretty straight forward. Like xe^x u is x, v is e^x. xlnx, u has to be lnx and v = x because lnx is not a simple integration. For something like sinxe^x, you let sin be u and e^x be v and then know its going to be a loop. But yeah ,do you have any examples?