Differentiate w.r.t. n
-\frac{9}{10} = -0.9
Evaluate
-\frac{9n}{10}
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\frac{\mathrm{d}}{\mathrm{d}n}(-\frac{9}{10}n)
Divide -18n by 20 to get -\frac{9}{10}n.
-\frac{9}{10}n^{1-1}
The derivative of ax^{n} is nax^{n-1}.
-\frac{9}{10}n^{0}
Subtract 1 from 1.
-\frac{9}{10}
For any term t except 0, t^{0}=1.
-\frac{9}{10}n
Divide -18n by 20 to get -\frac{9}{10}n.
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