(\partial)/(\partial y)(sqrt(5x^2+8xy+y^2))

解答

\frac{\partial}{\partial y} (5 x^{2} + 8 x y + y^{2})

\frac{y + 4 x}{5 x ^{2} + 8 x y + y ^{2}}

求解步骤

\frac{\partial}{\partial y} (5 x^{2} + 8 x y + y^{2})

将

x

视为常数

使用连锁律:

\frac{1}{2 5 x ^{2} + 8 x y + y ^{2}} \frac{\partial}{\partial y} (5 x^{2} + 8 x y + y^{2})

= \frac{1}{2 5 x ^{2} + 8 x y + y ^{2}} \frac{\partial}{\partial y} (5 x^{2} + 8 x y + y^{2})

\frac{\partial}{\partial y} (5 x^{2} + 8 x y + y^{2}) = 2 y + 8 x

= \frac{1}{2 5 x ^{2} + 8 x y + y ^{2}} (2 y + 8 x)

化简

\frac{1}{2 5 x ^{2} + 8 x y + y ^{2}} (2 y + 8 x) : \frac{y + 4 x}{5 x ^{2} + 8 x y + y ^{2}}

= \frac{y + 4 x}{5 x ^{2} + 8 x y + y ^{2}}

\frac{d y}{d x} + \frac{5 x ^{2}}{e ^{3 x^{3}}} y = 0

x y^{^{'}} - 2 y = 2 x^{2} + x - 2

\int \frac{( x ^{2} - x + 4 )}{x ^{3} + 2 x} d x

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

\frac{d}{d x} (- x^{2} + 25)