Differentiate w.r.t. a
\frac{1}{5a^{\frac{4}{5}}}
Evaluate
\sqrt[5]{a}
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\frac{1}{5}a^{\frac{1}{5}-1}
The derivative of ax^{n} is nax^{n-1}.
\frac{1}{5}a^{-\frac{4}{5}}
Subtract 1 from \frac{1}{5}.
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