已知实数x,y满足不等式组:2x-y=0,x+2y

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已知实数x,y满足不等式组:2x-y=0,x+2y已知实数x,y满足不等式组:2x-y=0,x+2y已知实数x,y满足不等式组:2x-y=0,x+2ym=6z=x-y过(0,3)时z最小,(0,3)在

已知实数x,y满足不等式组:2x-y=0,x+2y
已知实数x,y满足不等式组:2x-y=0,x+2y

已知实数x,y满足不等式组:2x-y=0,x+2y
m=6
z=x-y过(0,3)时z最小,(0,3)在直线x+2y=m上,所以m=6.