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Quotient rule

The following table lists the values of functions ff and gg, and of their derivatives, ff' and gg', for x=1x=-1.
xxf(x)f(x)g(x)g(x)f(x)f'(x)g(x)g'(x)
1-13311442-2
Evaluate ddx[f(x)g(x)]\dfrac{d}{dx}\left[\dfrac{f(x)}{g(x)}\right] at x=1x=-1.