What is (\partial)/(\partial x)(1/(x^2+1)) ?

The answer to (\partial)/(\partial x)(1/(x^2+1)) is -(2x)/((x^2+1)^2)

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(\partial)/(\partial x)(1/(x^2+1))

\frac{\partial}{\partial x} (\frac{1}{x ^{2} + 1})

- \frac{2 x}{( x ^{2} + 1 ) ^{2}}

Solution steps

\frac{\partial}{\partial x} (\frac{1}{x ^{2} + 1})

Apply exponent rule:

\frac{1}{a} = a^{- 1}

= \frac{\partial}{\partial x} ((x^{2} + 1)^{- 1})

Apply the chain rule:

- \frac{1}{( x ^{2} + 1 ) ^{2}} \frac{\partial}{\partial x} (x^{2} + 1)

= - \frac{1}{( x ^{2} + 1 ) ^{2}} \frac{\partial}{\partial x} (x^{2} + 1)

\frac{\partial}{\partial x} (x^{2} + 1) = 2 x

= - \frac{1}{( x ^{2} + 1 ) ^{2}} \cdot 2 x

Simplify

- \frac{1}{( x ^{2} + 1 ) ^{2}} \cdot 2 x : - \frac{2 x}{( x ^{2} + 1 ) ^{2}}

= - \frac{2 x}{( x ^{2} + 1 ) ^{2}}

\frac{d}{d x} (\frac{- 2 x - y}{x + 2 y})

\frac{\partial}{\partial x} (\frac{x y - x ^{2}}{y})

g (t) = 3 + t^{5} + sin (π t)

x^{3} (x - 6)^{2}

What is (\partial)/(\partial x)(1/(x^2+1)) ?
The answer to (\partial)/(\partial x)(1/(x^2+1)) is -(2x)/((x^2+1)^2)