Can anyone help me with this?

Attachment 27017

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- Feb 14th 2013, 07:21 AMFrankkairIntegral of r^2 times square root of 4r^2 + 1 dr.
Can anyone help me with this?

Attachment 27017

? - Feb 14th 2013, 07:42 AMPlatoRe: Integral of r^2 times square root of 4r^2 + 1 dr.
- Feb 14th 2013, 08:01 AMFrankkairRe: Integral of r^2 times square root of 4r^2 + 1 dr.
Thank you, but again I have a question (now a more basic one)

I got this, but I can't solve (guess my algebra is not working today)

Attachment 27019

Could u help me? Thanks! - Feb 14th 2013, 10:51 AMHallsofIvyRe: Integral of r^2 times square root of 4r^2 + 1 dr.
Seriously? Just put "17" and "1" in for u and subtract. You really can't do much with $\displaystyle 17^{5/2}$ or $\displaystyle 17^{3/2}$ but, of course, $\displaystyle 1^{5/2}= 1^{3/2}= 1$.