A difficult problem. Prove that f is derivable or find an example of a f(x) not derivable.
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Originally Posted by kezman A difficult problem. Prove that f is derivable or find an example of a f(x) not derivable. Do you mean find which is differentiable nowhere in , or at some given point or at ? RonL
May be is to prove if the function f is differentinable everywhere in R or not?
Yes prove if the function f is differentiable in x=0 or not
Last edited by kezman; Dec 25th 2006 at 12:31 PM.
Originally Posted by kezman Yes prove if the function f is differentiable everywhere in R or not Try the function: Which is differentiable at but nowhere else. RonL
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