Differentiate implicitly to find $\frac{dy}{dx}$ for $x + xy + y = 4$.
University of Ilorin MTH102 2023 past question
- $\frac{-(y+1)}{x+1}$
- $\frac{y-1}{x+1}$
- $\frac{-(x+1)}{y+1}$
- $\frac{y+1}{x+1}$
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