d/(dz(t))(((x-1)z(t))/(2z(t)-4t+1))

解答

\frac{d ^{2}}{d z d t} (\frac{( x ( z , t ) - 1 ) z ( t )}{2 z ( t ) - 4 t + 1})

\frac{( 2 z ^{2} t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) - 4 t ^{2} \frac{d}{d t} ( x ( z , t ) ) - 4 z t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 8 t + t \frac{d}{d t} ( x ( z , t ) ) + z t \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 4 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 8 t x ( z , t ) - 8 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 ) ( 2 z t - 4 t + 1 ) - 4 t ( z - 2 ) ( 4 t + 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 )}{( 2 z t - 4 t + 1 ) ^{3}}

求解步骤

\frac{d ^{2}}{d z d t} (\frac{( x ( z , t ) - 1 ) z ( t )}{2 z ( t ) - 4 t + 1})

\frac{d}{d z} (\frac{( x ( z , t ) - 1 ) z t}{2 z t - 4 t + 1}) = \frac{t ( 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) + 4 t + z \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) - 1 )}{( 2 z t - 4 t + 1 ) ^{2}}

= \frac{d}{d t} (\frac{t ( 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) + 4 t + z \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) - 1 )}{( 2 z t - 4 t + 1 ) ^{2}})

\frac{d}{d t} (\frac{t ( 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) + 4 t + z \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) - 1 )}{( 2 z t - 4 t + 1 ) ^{2}}) = \frac{( 2 z ^{2} t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) - 4 t ^{2} \frac{d}{d t} ( x ( z , t ) ) - 4 z t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 8 t + t \frac{d}{d t} ( x ( z , t ) ) + z t \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 4 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 8 t x ( z , t ) - 8 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 ) ( 2 z t - 4 t + 1 ) - 4 t ( z - 2 ) ( 4 t + 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 )}{( 2 z t - 4 t + 1 ) ^{3}}

= \frac{( 2 z ^{2} t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) - 4 t ^{2} \frac{d}{d t} ( x ( z , t ) ) - 4 z t ^{2} \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 8 t + t \frac{d}{d t} ( x ( z , t ) ) + z t \frac{d}{d t} ( \frac{d}{d z} ( x ( z , t ) ) ) + 4 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 8 t x ( z , t ) - 8 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 ) ( 2 z t - 4 t + 1 ) - 4 t ( z - 2 ) ( 4 t + 2 z ^{2} t \frac{d}{d z} ( x ( z , t ) ) - 4 t x ( z , t ) - 4 z t \frac{d}{d z} ( x ( z , t ) ) + x ( z , t ) + z \frac{d}{d z} ( x ( z , t ) ) - 1 )}{( 2 z t - 4 t + 1 ) ^{3}}

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

d er i v a t i v e - x sin (x)

(x^{4} - y^{2}) d x (x^{3} - 2 x y) d y = 0

\int - 56 sin (7 z - 5) d z

\frac{d}{d x} (3 2 x^{2})