微分方程2(xy+x)y.=y的通解是（） A、<img width="59" height="24" alt="" src="/lqwvjeImg/cc/cc6f798d17c6f1b9c53a4a8d50ea3c09.png" style="" /> B、<img width="66" height="24" alt="" src="/lqwvjeImg/6e/6e2f77a5eb7185ddb677abd66bcaaa77.png" style="" /> C、<img width="74" height="24" alt="" src="/lqwvjeImg/16/169cbffa36610cc386bc25884ac2192e.png" style="" /> D、<img width="66" height="24" alt="" src="/lqwvjeImg/77/77e88d32e9b707e946a6e96094bef961.png" style="" />