d/(dv)((p)(p+(8.2)/(v^2))(v-5.4))

解答

\frac{d}{d v} ((p (v)) (p (v) + \frac{8.2}{v ^{2}}) (v - 5.4))

2 v p \frac{d p}{d v} - 10.8 p \frac{d p}{d v} + \frac{8.2 \frac{d p}{d v}}{v} + \frac{- 8.2 p - 44.28 \frac{d p}{d v}}{v ^{2}} + \frac{88.56 p}{v ^{3}} + p^{2}

求解步骤

\frac{d}{d v} ((p) (p + \frac{8.2}{v ^{2}}) (v - 5.4))

使用微分乘法定则:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = p, g = (p + \frac{8.2}{v ^{2}}) (v - 5.4)

= \frac{d p}{d v} (p + \frac{8.2}{v ^{2}}) (v - 5.4) + \frac{d}{d v} ((p + \frac{8.2}{v ^{2}}) (v - 5.4)) p

\frac{d}{d v} ((p + \frac{8.2}{v ^{2}}) (v - 5.4)) = v \frac{d p}{d v} - 5.4 \frac{d p}{d v} - \frac{8.2}{v ^{2}} + \frac{88.56}{v ^{3}} + p

= \frac{d p}{d v} (p + \frac{8.2}{v ^{2}}) (v - 5.4) + (v \frac{d p}{d v} - 5.4 \frac{d p}{d v} - \frac{8.2}{v ^{2}} + \frac{88.56}{v ^{3}} + p) p

化简

\frac{d p}{d v} (p + \frac{8.2}{v ^{2}}) (v - 5.4) + (v \frac{d p}{d v} - 5.4 \frac{d p}{d v} - \frac{8.2}{v ^{2}} + \frac{88.56}{v ^{3}} + p) p : 2 v p \frac{d p}{d v} - 10.8 p \frac{d p}{d v} + \frac{8.2 \frac{d p}{d v}}{v} + \frac{- 8.2 p - 44.28 \frac{d p}{d v}}{v ^{2}} + \frac{88.56 p}{v ^{3}} + p^{2}

= 2 v p \frac{d p}{d v} - 10.8 p \frac{d p}{d v} + \frac{8.2 \frac{d p}{d v}}{v} + \frac{- 8.2 p - 44.28 \frac{d p}{d v}}{v ^{2}} + \frac{88.56 p}{v ^{3}} + p^{2}

e x p an d e^{k t} cosh (2 k t) - H (t - a) (t - 2)

e x p an d (x - 2 y) d x - d y

e x p an d (a + 2) e^{3}

e x p an d (x^{2} + 1) \circ (x + 1)

e x p an d (x^{2} + 1) ln (x + 1)