2y"=3y^2
设y'=p,y''=pdp/dy
2pdp/dy=3y^2
p^2=y^3+C,由y(-2)=1,y'(-2)=1代入:C=0
p=y^(3/2) ,(y'(-2)=1>0,取+号)
y^(-3/2)dy=dx
-2y^(-1/2)=x+C,由y(-2)=1代入:C=0
特解为x√y=-2
2y"=3y^2
设y'=p,y''=pdp/dy
2pdp/dy=3y^2
p^2=y^3+C,由y(-2)=1,y'(-2)=1代入:C=0
p=y^(3/2) ,(y'(-2)=1>0,取+号)
y^(-3/2)dy=dx
-2y^(-1/2)=x+C,由y(-2)=1代入:C=0
特解为x√y=-2