Find , when
I think... ?
Last edited by Lil; Oct 19th 2010 at 08:31 AM.
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I'll find , but i don't know how get first expression
what is given to you? . and if you have to find ,why are you trying to determine ?
I need find f'(x).
how u get
because when you are differentiating , you are getting , since the derivative of in is .