Differentiate w.r.t. n
-14n
Evaluate
-7n^{2}
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2\left(-7\right)n^{2-1}
The derivative of ax^{n} is nax^{n-1}.
-14n^{2-1}
Multiply 2 times -7.
-14n^{1}
Subtract 1 from 2.
-14n
For any term t, t^{1}=t.
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