Derivatives of powers of polynomials

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Find the derivative $\;\;\;\frac{d}{dx}\left(x+2\right)^{-1}$

**Answer**

$\;\;\;\frac{d}{dx}\left(x+2\right)^{-1}$

$=-1\left(x+2\right)^{-2}\left(1\right)$

$=-1\left(x+2\right)^{-2}$