计算题

解方程：x=y

解答题：（y+x）dy+（y-x）dx=0

问答题解答题：（y+x）dy+（y-x）dx=0

解方程：y,sinxcosx-y-sin3x=0

问答题解方程：y^,sinxcosx-y-sin³x=0

解方程：y-xy,=

问答题

解方程：y-xy^,=