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#1 2009-02-04 06:56:02
- Daniel123
- Member
- Registered: 2007-05-23
- Posts: 663
Quick integral
Having just evaluated 45 integrals, my brain has gone numb.
Can someone please tell me what to do for this:
Thanks.
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#2 2009-02-04 07:30:17
- George,Y
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- Registered: 2006-03-12
- Posts: 1,379
Re: Quick integral
a/(aa+4) ?
X'(y-Xβ)=0
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#3 2009-02-04 07:32:41
- Daniel123
- Member
- Registered: 2007-05-23
- Posts: 663
Re: Quick integral
George,Y wrote:
a/(aa+4) ?
Sorry?
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#4 2009-02-04 09:04:07
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: Quick integral
I think George is substituting, using
.Why did the vector cross the road?
It wanted to be normal.
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#5 2009-02-04 09:07:43
- TheDude
- Member
- Registered: 2007-10-23
- Posts: 361
Re: Quick integral
That's not what it comes out to though. Using that substitution gives
, which I'm not certain is better than what we started with.Wrap it in bacon
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#6 2009-02-04 09:50:37
- luca-deltodesco
- Member
- Registered: 2006-05-05
- Posts: 1,470
Re: Quick integral
Last edited by luca-deltodesco (2009-02-04 10:07:32)
The Beginning Of All Things To End.
The End Of All Things To Come.
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#7 2009-02-04 09:59:15
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: Quick integral
TheDude wrote:
, which I'm not certain is better than what we started with.
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#8 2009-02-04 10:08:05
- TheDude
- Member
- Registered: 2007-10-23
- Posts: 361
Re: Quick integral
JaneFairfax wrote:
TheDude wrote:, which I'm not certain is better than what we started with.
Well, when you put it like that, it is better 
Wrap it in bacon
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#9 2009-02-04 12:07:32
- Daniel123
- Member
- Registered: 2007-05-23
- Posts: 663
Re: Quick integral
Thanks guys and girls
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