Last edited by pankaj; Aug 4th 2009 at 05:01 PM.
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The standard definition of a one-sided derivative of f at 0 requires f to have a value at 0, which your f does not. What definition of one-sided derivative are you using? Do you mean the value that the derivative function approaches at 0 (ie., )?
Thanks slider142.I have edited my post.
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