What is (\partial)/(\partial y)(x/(8+y)) ?

The answer to (\partial)/(\partial y)(x/(8+y)) is -x/((8+y)^2)

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(\partial)/(\partial y)(x/(8+y))

\frac{\partial}{\partial y} (\frac{x}{8 + y})

- \frac{x}{( 8 + y ) ^{2}}

Solution steps

\frac{\partial}{\partial y} (\frac{x}{8 + y})

Treat

x

as a constant

Take the constant out:

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

= x \frac{\partial}{\partial y} (\frac{1}{8 + y})

Apply exponent rule:

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

= x \frac{\partial}{\partial y} ((8 + y)^{- 1})

Apply the chain rule:

- \frac{1}{( 8 + y ) ^{2}} \frac{\partial}{\partial y} (8 + y)

= - \frac{1}{( 8 + y ) ^{2}} \frac{\partial}{\partial y} (8 + y)

\frac{\partial}{\partial y} (8 + y) = 1

= x (- \frac{1}{( 8 + y ) ^{2}} \cdot 1)

Simplify

x (- \frac{1}{( 8 + y ) ^{2}} \cdot 1) : - \frac{x}{( 8 + y ) ^{2}}

= - \frac{x}{( 8 + y ) ^{2}}

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f (x) = 5 - x

What is (\partial)/(\partial y)(x/(8+y)) ?
The answer to (\partial)/(\partial y)(x/(8+y)) is -x/((8+y)^2)