Differentiate w.r.t. x
81\pi x^{80}
Evaluate
\pi x^{81}
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\frac{\mathrm{d}}{\mathrm{d}x}(\pi x^{81})
Calculate 9 to the power of 2 and get 81.
81\pi x^{81-1}
The derivative of ax^{n} is nax^{n-1}.
81\pi x^{80}
Subtract 1 from 81.
\pi x^{81}
Calculate 9 to the power of 2 and get 81.
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