Differentiate w.r.t. a
\frac{23a^{22}}{2}
Evaluate
\frac{a^{23}}{2}
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23\times \frac{1}{2}a^{23-1}
The derivative of ax^{n} is nax^{n-1}.
\frac{23}{2}a^{23-1}
Multiply 23 times \frac{1}{2}.
\frac{23}{2}a^{22}
Subtract 1 from 23.
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