derivative F(t)=(3t-1)^4(2t+1)^{-3}

解答

导数

F (t) = (3 t - 1)^{4} (2 t + 1)^{- 3}

\frac{12 ( 3 t - 1 ) ^{3}}{( 2 t + 1 ) ^{3}} - \frac{6 ( 3 t - 1 ) ^{4}}{( 2 t + 1 ) ^{4}}

求解步骤

\frac{d}{d t} ((3 t - 1)^{4} (2 t + 1)^{- 3})

使用微分乘法定则:

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

f = (3 t - 1)^{4}, g = (2 t + 1)^{- 3}

= \frac{d}{d t} ((3 t - 1)^{4}) (2 t + 1)^{- 3} + \frac{d}{d t} ((2 t + 1)^{- 3}) (3 t - 1)^{4}

\frac{d}{d t} ((3 t - 1)^{4}) = 12 (3 t - 1)^{3}

\frac{d}{d t} ((2 t + 1)^{- 3}) = - \frac{6}{( 2 t + 1 ) ^{4}}

= 12 (3 t - 1)^{3} (2 t + 1)^{- 3} + (- \frac{6}{( 2 t + 1 ) ^{4}}) (3 t - 1)^{4}

化简

12 (3 t - 1)^{3} (2 t + 1)^{- 3} + (- \frac{6}{( 2 t + 1 ) ^{4}}) (3 t - 1)^{4} : \frac{12 ( 3 t - 1 ) ^{3}}{( 2 t + 1 ) ^{3}} - \frac{6 ( 3 t - 1 ) ^{4}}{( 2 t + 1 ) ^{4}}

= \frac{12 ( 3 t - 1 ) ^{3}}{( 2 t + 1 ) ^{3}} - \frac{6 ( 3 t - 1 ) ^{4}}{( 2 t + 1 ) ^{4}}

t y^{^{'}} + y = t^{4} y^{3}

\int (a x^{2} + b x + c) d x

t an g e n t y = \frac{2 x - 1}{x + 2}

\frac{d}{d x} (x^{2} (ln (x)))

\frac{d}{d x} (ln (6 sec (x)))