What I am unsure of is how to find the derivative of u. Since the original integral is integrating with respect to y, should I be finding the derivative of u with respect to y, and treat the x's as contants?
Answers and Replies
#2
Roni1985
201
0
I think it's possible to solve it in terms of x
let u=x and dv=e^(-x(1+y))
then,
du=1
and v= [e^(-x(1+y))]/(-(1+y))
I think it should work
if you want let
u=e^(-x(1+y))
du= -(1+y)*e^(-x(1+y))
you treat y as a constant and x as a variable
(I am assuming you want to integrate in terms of x)
#3
Shoney45
68
0
Alrighty then - I'll get to work. Thanks for the direction.
You can simplify this problem, by performing a w substitution at the beginning ie. consider w = -x*(1+y). It will make the integration by parts less of a headache.