实数XY,满足不等式x-y+2>=0 x+y-4>=0 2x-y-5

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实数XY,满足不等式x-y+2>=0x+y-4>=02x-y-5实数XY,满足不等式x-y+2>=0x+y-4>=02x-y-5求a的取值范围实数XY,满足不等式x-y+2>=0x+y-4>=02x-

实数XY,满足不等式x-y+2>=0 x+y-4>=0 2x-y-5
实数XY,满足不等式x-y+2>=0 x+y-4>=0 2x-y-5<=0 目标函数z=y-axa属于R取最大值时唯一最优解是(1,3)
求a的取值范围

实数XY,满足不等式x-y+2>=0 x+y-4>=0 2x-y-5
先根据三个条件画出可行域范围,由图知直线x-y+2>=0与直线x+y-4>=0相交于点(1,3),要求得唯一最优值,则1