What is (\partial)/(\partial s)(sqrt(s^2+t^2)) ?

The answer to (\partial)/(\partial s)(sqrt(s^2+t^2)) is s/(sqrt(s^2+t^2))

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(\partial)/(\partial s)(sqrt(s^2+t^2))

\frac{\partial}{\partial s} (s^{2} + t^{2})

\frac{s}{s ^{2} + t ^{2}}

Solution steps

\frac{\partial}{\partial s} (s^{2} + t^{2})

Treat

t

as a constant

Apply the chain rule:

\frac{1}{2 s ^{2} + t ^{2}} \frac{\partial}{\partial s} (s^{2} + t^{2})

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

\frac{\partial}{\partial s} (s^{2} + t^{2}) = 2 s

= \frac{1}{2 s ^{2} + t ^{2}} \cdot 2 s

Simplify

\frac{1}{2 s ^{2} + t ^{2}} \cdot 2 s : \frac{s}{s ^{2} + t ^{2}}

= \frac{s}{s ^{2} + t ^{2}}

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What is (\partial)/(\partial s)(sqrt(s^2+t^2)) ?
The answer to (\partial)/(\partial s)(sqrt(s^2+t^2)) is s/(sqrt(s^2+t^2))