Show that if is differentiable at , How do we go about proving it? Thanks in advance.
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Hint By definition, .
Originally Posted by FernandoRevilla Hint By definition, . , but , so is it right to say ?
Originally Posted by alphabeta89 , but , so is it right to say ? Use the substitution so,
Originally Posted by FernandoRevilla Use the substitution so, So is it correct to say that ?
Last edited by alphabeta89; Jan 12th 2012 at 10:07 PM.
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