(\partial)/(\partial θ)(r(θ))

解答

\frac{\partial}{\partial θ} (r (θ))

r

求解步骤

\frac{\partial}{\partial θ} (r (θ))

将

r

视为常数

将常数提出:

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

= r \frac{\partial}{\partial θ} (θ)

使用常见微分定则:

\frac{\partial}{\partial θ} (θ) = 1

= r \cdot 1

化简

= r

\frac{d}{d x} ((x^{2} - 2 x) e^{4 x})

\int (x + 1)^{- 8} d x

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

y^{^{''}} + 2 y^{^{'}} + 5 y = 0, y (0) = 1, y^{^{'}} (0) = - 2

\int x x^{2} + a^{2} d x