What is the derivative of sqrt((x^2+1)) ?

The derivative of sqrt((x^2+1)) is x/(sqrt(x^2+1))

What is the first derivative of sqrt((x^2+1)) ?

The first derivative of sqrt((x^2+1)) is x/(sqrt(x^2+1))

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

\frac{x}{x ^{2} + 1}

Solution steps

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

Apply the chain rule:

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

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

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

= \frac{1}{2 x ^{2} + 1} \cdot 2 x

Simplify

\frac{1}{2 x ^{2} + 1} \cdot 2 x : \frac{x}{x ^{2} + 1}

= \frac{x}{x ^{2} + 1}

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What is the derivative of sqrt((x^2+1)) ?
The derivative of sqrt((x^2+1)) is x/(sqrt(x^2+1))
What is the first derivative of sqrt((x^2+1)) ?
The first derivative of sqrt((x^2+1)) is x/(sqrt(x^2+1))