Double integrals Watch

Bameron
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Hello,

I'm unsure of my limits.

My instinct is saying 2pi and 0 for theta and either 0 and infinity for r, or negative infinity and positive infinity for r, but both of these give 0, so I'm stuck.

Some help would be great, thanks.
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ghostwalker
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(Original post by Bameron)
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Hello,

I'm unsure of my limits.

My instinct is saying 2pi and 0 for theta and either 0 and infinity for r, or negative infinity and positive infinity for r, but both of these give 0, so I'm stuck.

Some help would be great, thanks.
The first one. 0 to 2pi traces out an entire circle centre the origin, and then r from 0 to infinity covers the whole plane.

If you're getting zero, check your working, and if unresolved post it.
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Bameron
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Thanks, worked out fine I think actually
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