Differentiate w.r.t. a
-13
Evaluate
49-13a
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\frac{\mathrm{d}}{\mathrm{d}a}(-13a+49)
Combine a and -14a to get -13a.
-13a^{1-1}
The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.
-13a^{0}
Subtract 1 from 1.
-13
For any term t except 0, t^{0}=1.
-13a+49
Combine a and -14a to get -13a.
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