ONLINE WEB TRICKS Hot Questions - Stack Exchange Questions What is wrong in this proof (given in description) that any derivative function must be continuous? – math.stackexchange.com

What is wrong in this proof (given in description) that any derivative function must be continuous? – math.stackexchange.com

05:36 Posted by Unknown No Comments

But clearly the statement must not be true as for some functions like the following one, the derivative exists at zero but derivative is not continous at zero.

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