Double integration

Question

Double integration

johnweldon1993 · Answer

$$\large \int \int_D \frac{1}{x^2 + y^2}dA$$ where D is the region between the circles $\large x^2 + y^2 = 1$ and $\large x^2 + y^2 = 4$

adamaero · Answer

ohhh, Calc III

johnweldon1993 · Answer

Yeah, probably be fun once we start getting into it, just gave us a practice sheet for now though lol

adamaero · Answer

I'm only in Calc II. I'd start here: http://patrickjmt.com/?s=double+integrals then, http://tutorial.math.lamar.edu/Classes/CalcIII/DoubleIntegrals.aspx

adamaero · Answer

http://patrickjmt.com/calculating-a-double-integral-basic-idea-and-examples/

johnweldon1993 · Answer

Actually Im pretty sure I got it, just had to think lol

*and actually, I'm one of the ones at the top of the list lol, usually when asking a question like this most people *other than the experience here* would say no way! lol

Would just have to subtract the result we get from the inner circle from the result we get from the outer circle

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johnweldon1993 · Answer

So we would take the double integral of the inner circle and then subtract that result from the double integral of the outer circle...thus giving use the region in between

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