(2)微分方程 (x-2)dfrac (dy)(dx)=y+2((x-2))^3 的通解为 ()-|||-(A) =(x-2)-C((x-2))^2 (B) =
微分方程(x-2)y=y+2((x-2))^3的通解是（）A (x-2)y=y+2((x-2))^3B (x-2)y=y+2((x-2))^3C (x-2)y=
[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx
[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx
[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx
直线(x-2)/(2) = (y+2)/(1) = (z-4)/(3)与平面x + y + z = 4的关系是垂直()。A. 正确B. 错误
(({int )_(-2)^2}(x-2)sqrt (4-{x)^2}dx
(int )_(-2)^2(x-2)sqrt (4-{x)^2}dx
dfrac (dy)(dx)=(x)^2+(y)^2 B . dfrac (dy)(dx)=(x)^2+(y)^2 C .dfrac (dy)(dx)=(x)^
例1 将 iintlimits_(D)f(x,y)dx dy 化为累次积分，其中D由直线 y=x, y=x-2, y=2, y=4 围成。例1 将 $\iint