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#1 2012-06-23 13:17:53
- genericname
- Member
- Registered: 2012-05-16
- Posts: 52
Integration question
∫ dx/(x^2 + 9)
The answer to that is 1/3 arctan (x/3) + C, but what are the steps to getting there? Where does the x/3 come from when using U-substitution (u = x/3)?
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#2 2012-06-23 14:48:51
- gAr
- Member
- Registered: 2011-01-09
- Posts: 3,482
Re: Integration question
Hi genericname,
Yes, that's right.
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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