Differentiate w.r.t. n
-\frac{7n^{3}}{4}
Evaluate
-\frac{7n^{4}}{16}
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\frac{\mathrm{d}}{\mathrm{d}n}(-\frac{7}{16}n^{4})
Multiply -\frac{7}{4} and \frac{1}{4} to get -\frac{7}{16}.
4\left(-\frac{7}{16}\right)n^{4-1}
The derivative of ax^{n} is nax^{n-1}.
-\frac{7}{4}n^{4-1}
Multiply 4 times -\frac{7}{16}.
-\frac{7}{4}n^{3}
Subtract 1 from 4.
-\frac{7}{16}n^{4}
Multiply -\frac{7}{4} and \frac{1}{4} to get -\frac{7}{16}.
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