Derivative function. Is the book wrong?

noahsdev
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Differentiate the following with a positive index:
\frac{2}{\sqrt[3]{x}}
What the book says:
\frac{-2}{3x^ \frac{2}{3}}
But shouldn't it be:
\frac{-2}{3x^ \frac{4}{3}}
I just wan't to know if I'm doing something wrong, thanks :).
 
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I agree with you.
 
Your book is wrong.
 
Cool thanks, just wanted to check.
 
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