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November 22, 2014

November 22, 2014

Posted by **sh** on Tuesday, October 26, 2010 at 8:59pm.

f(x)=x^(1/3), a=-27, x=-28

I found the derivative to be

f'(x)= 1/[3(-27)^(2/3)]

but it does not exist because a number cannot be negative in a root.

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