Differentiate w.r.t. a
-\frac{2017}{a^{2018}}
Evaluate
\frac{1}{a^{2017}}
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-2017a^{-2017-1}
The derivative of ax^{n} is nax^{n-1}.
-2017a^{-2018}
Subtract 1 from -2017.
Examples
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