已知yx^2+2xy^3+3=-18 求dy/dx
已知yx^2+2xy^3+3=-18 求dy/dx
求方程dy/dx=(1+y^2)/(xy+yx^3)的解.
(x³-2xy²)dy+(2y³-3yx²)dx=0求通解
已知x^2y+2xy+3=-18 求dy/dx
求方程(y^2+xy^2)dx+(x^2-yx^2)dy=0的通解
求dx/dy-3xy=xy^2的通解
求通解,dy/dx-3xy=xy^2
x^2+xy+y^3=1,求dy/dx
求微分方程dy/dx+2xy=3x
xy-3xy+2yx-yx
∮(yx^3+e^y)dx+(xy^3+(xe^y)-2y)dy,其中L:X^2+Y^2=a^2逆时针方向拜托了各位
∫C (yx^3+e^y)dx+(xy^3+xe^y-2y)dy,其中C为正向圆周x^2+y^2=a^2