The Differentials: Example 5

Problem:

Find d\left(3w^{-1}+\frac{w^2}{4}-7\right).

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SOLUTION:

=\left(-\frac{3}{w^2}\right)dw+\left(\frac{w}{2}\right)dw-0

=\left(\frac{-3}{w^2}+\frac{w}{2}\right)dw