(\partial)/(\partial y)(2xy^4)

解答

\frac{\partial}{\partial y} (2 x y^{4})

8 x y^{3}

求解步骤

\frac{\partial}{\partial y} (2 x y^{4})

将

x

视为常数

将常数提出:

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

= 2 x \frac{\partial}{\partial y} (y^{4})

使用幂法则:

\frac{d}{d x} (x^{a}) = a \cdot x^{a - 1}

= 2 x \cdot 4 y^{4 - 1}

化简

= 8 x y^{3}

d er i v a t i v e f (x) = (x)^{(3)} e^{(3 x)}

x \to 0 + lim ((tan (x))^{x})

\int 9 x 1 - x^{4} d x

2 cos (x) d y = (y sin (x) - y^{3}) d x

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