Differentiate w.r.t. k
\frac{2}{\sqrt[3]{k}}
Evaluate
3k^{\frac{2}{3}}
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\frac{2}{3}\times 3k^{\frac{2}{3}-1}
The derivative of ax^{n} is nax^{n-1}.
2k^{\frac{2}{3}-1}
Multiply \frac{2}{3} times 3.
2k^{-\frac{1}{3}}
Subtract 1 from \frac{2}{3}.
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