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iThink

How to do this integral?

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Hi,

This was posted online kind of like a challenge.

 

10151357_428974413904442_1896541651_n.jp

 

I've been through calculus courses, but still, this looks weird. For example, the R doesn't seem to belong, and I have no idea what it stands for.

 

Help?

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The hint is in that R. Convert to spherical coordinates and see how it goes for you.

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Hi,

This was posted online kind of like a challenge.

 

10151357_428974413904442_1896541651_n.jp

 

I've been through calculus courses, but still, this looks weird. For example, the R doesn't seem to belong, and I have no idea what it stands for.

 

Help?

Based on the integration limits it appears that the differential should be dzdydx.

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