Differentiate w.r.t. k
-\frac{1}{6k^{\frac{7}{6}}}
Evaluate
\frac{1}{\sqrt[6]{k}}
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-\frac{1}{6}k^{-\frac{1}{6}-1}
The derivative of ax^{n} is nax^{n-1}.
-\frac{1}{6}k^{-\frac{7}{6}}
Subtract 1 from -\frac{1}{6}.
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