(\partial)/(\partial x)(xsec(y))

解答

\frac{\partial}{\partial x} (x sec (y))

sec (y)

求解步骤

\frac{\partial}{\partial x} (x sec (y))

将

y

视为常数

将常数提出:

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

= sec (y) \frac{\partial}{\partial x} (x)

使用常见微分定则:

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

= sec (y) \cdot 1

化简

= sec (y)

y^{^{'}} = \frac{cot ( y )}{t}

\int \frac{1}{3} x d x

l a pl a ce t r an s f or m e^{- 2 x}

(1 - x) y^{^{'}} - 4 x y^{^{'}} + 5 y = cos (x)

\frac{d}{d x} (\frac{1 - x}{e ^{x}})