已知实数x,y 满足｛ x-y+2>=0 x+y-4>=0 2x-y-5
问题描述：
已知实数x,y 满足｛ x-y+2>=0 x+y-4>=0 2x-y-5
答
用画图法,分别把x-y+2>=0 x+y-4>=0 2x-y-5具体呢？|x+2y-4|0分情况去绝对值
已知实数x,y 满足｛ x-y+2>=0 x+y-4>=0 2x-y-5
用画图法,分别把x-y+2>=0 x+y-4>=0 2x-y-5具体呢？|x+2y-4|0分情况去绝对值