Differentiate w.r.t. w
1
Evaluate
w+8
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\frac{\mathrm{d}}{\mathrm{d}w}(w+8)
Combine 90w and -89w to get w.
w^{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}.
w^{0}
Subtract 1 from 1.
1
For any term t except 0, t^{0}=1.
w+8
Combine 90w and -89w to get w.
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