则 (y)_(x=0)= __ _-|||-bigcirc A.dfrac (2)(3)-|||-bigcirc B. dfrac (1)(3)dx-|||-C.dfrac (2)(3)dx-|||-bigcirc D. dfrac (1)(3) 4

计算(int )_(-2)^1dfrac (1)({(7+3x))^3}dx-|||-__时，令(int )_(-2)^1dfrac (1)({(7+3x))^

int dfrac (2cdot {3)^x-5cdot (2)^x}({3)^x}dx-|||-__；；

微分方程dfrac (dy)(dx)=dfrac ({y)^2+(x)^3}(2xy)的通解为：dfrac (dy)(dx)=dfrac ({y)^2+(x)^

.函数 =sqrt [3](dfrac {x)(y)} 在点(1,1,1)处的全微分 du= ()()-|||-则= ())-|||-A =-dx-|||-B

(3) int dfrac (1)({(1+{x)^2)}^dfrac (3{2)}}dx;

int dfrac ({x)^3}({(1+{x)^2)}^2}dx=A.int dfrac ({x)^3}({(1+{x)^2)}^2}dx=B.int df

1.计算下列定积分:-|||-(1) (int )_(dfrac {pi )(3)}^pi sin (x+dfrac (pi )(3))dx-|||-(2) (

dfrac (dy)(dx)=(x)^2+(y)^2 B . dfrac (dy)(dx)=(x)^2+(y)^2 C .dfrac (dy)(dx)=(x)^

求方程 dfrac (dy)(dx)=2x-1-3(y)^2 通过点dfrac (dy)(dx)=2x-1-3(y)^2 的第二次近似解.dfrac (dy)(

int dfrac ({x)^5+(x)^4-8}({x)^3-x}dx-|||-__-|||-__..