posted by yousif .
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 ?
abs( h = -2r)===> h = 2r ===> H = 3r