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

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

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

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

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

Solution steps

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

Treat

s

as a constant

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

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

Apply the chain rule:

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

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

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

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

Simplify

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

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

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