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#1 2007-04-29 20:56:17
- Mat
- Guest
double integral
how do u solve the following double integral
thank you
#2 2007-04-29 22:44:21
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: double integral
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#3 2007-04-30 00:33:07
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: double integral
You get that simply by integrating with respect to x first and then again with respect to y.
(This is partial integration, which means that when you're integrating with respect to x, you treat y as if it's a constant.)
Why did the vector cross the road?
It wanted to be normal.
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#4 2007-04-30 18:17:48
- mat
- Guest
Re: double integral
thanks guys!
I was getting abit confused with the
I= y^4/4+ y^3/2 dy
can you take the constant (1/8) out?
#5 2007-04-30 23:28:05
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: double integral
You can if you really want to, although you'll have to put it back in at the end and it might be easier just to leave it there. It'll certainly give you the right answer though.
Why did the vector cross the road?
It wanted to be normal.
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