Posted by **yousif** on Monday, January 16, 2012 at 3:01pm.

Hi

I'm Having a problem with a question in the application of the maximum and minimum (derivative)

I want to prove that the height = 3

and i had this relation ===> H = h + r

and h = - 2r !

I'm sure that (H) = 3 r

But I Can't get the answer of (h) in positive ... so can I use absolute Value ?

so that

abs( h = -2r)===> h = 2r ===> H = 3r

?????

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