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

解答

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

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

求解步骤

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

将

y

视为常数

使用微分除法定则:

(\frac{f}{g})^{'} = \frac{f ^{'} \cdot g - g ^{'} \cdot f}{g ^{2}}

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

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

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

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

化简

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

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

\int_{0}^{1} 1 + x^{4} + 2 x^{2} d x

\int \frac{1}{( x + 1 ) ( x - 2 )} d x

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d er i v a t i v e \frac{x + 1}{x ^{2}}