it an integral of$\displaystyle \frac{2\pi k' r^3\pho \omega rdr dz}{(z^2+r^2)^\frac{3}{2}}$

its a double integral but

how to integrate by dz

from plus to minus infinity

?

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- Jul 16th 2011, 06:33 AMtransgalacticintegration from plus to minus infinity
it an integral of$\displaystyle \frac{2\pi k' r^3\pho \omega rdr dz}{(z^2+r^2)^\frac{3}{2}}$

its a double integral but

how to integrate by dz

from plus to minus infinity

? - Jul 16th 2011, 10:56 AMChris L T521Re: integration from plus to minus infinity
- Jul 16th 2011, 10:58 AMSironRe: integration from plus to minus infinity
modified.

- Jul 16th 2011, 11:27 AMArythRe: integration from plus to minus infinity
Could you switch the order of integration on this? If $\displaystyle 2\pi k' \omega$ are constant wrt z and r I don't see the difference in integrating wrt z first or wrt r first. If that is the case you could just integrate wrt z and then let the OP use the limits they have wrt r. (I guess either way there would need to be an extra piece of information, whether the above vars are constant wrt r and z or the limits on r).