Let so,

Let so,

Since,

...but this is wrong.

the answer is:

Where did I go wrong? Thank You

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- February 3rd 2009, 10:20 AMKroogerIntegration By Parts: What am I doing wrong?

Let so,

Let so,

Since,

...but this is wrong.

the answer is:

Where did I go wrong? Thank You - February 3rd 2009, 11:14 AMOpalg
- February 3rd 2009, 03:23 PMKrooger
Ah I see, I was thinking you had to isolate dx in order to sub it in making my result du/3 instead of 3du.

Thank You - February 3rd 2009, 04:07 PMahawk1
[quote=Krooger;259573]

Let so,

Let so,

alright so u do uv-integral(vdu)

so,

3xsin(5x)/5-integral(sin(5x)/5*3dx

3xsin(5x)/5+3cos(5x)/25

do u understand how i got that?

or need me to explain further? - February 3rd 2009, 04:33 PMKrooger
Yup, got it (Rofl) I was thrown off from the fact that you can just use du, you dont have to isolate and replace dx. Because of that I was using du/3 not 3du.

Thank You again