已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
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![已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为](/uploads/image/z/1614942-54-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x-y%2B2%E2%89%A50%2Cx%2By-4%E2%89%A50%2C2x-y-5%E2%89%A40%2C%E5%88%993x%2B2y%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E4%B8%BA)
已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
已知实数x,y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0,则3x+2y的最大值为
A:x-y+2≥0→2x-2y+4≥0
B:x+y-4≥0→2x+2y-8≥0
C:2x-y-5≤0→-2x+y+5≥0
A+B→X≥1
B-C→X≥3
A+C→X≤7
总上:3≤X≤7
B-A→Y≥3
A+C→Y≤9
B+C→Y≥1
总上:3≤Y≤9
所以3X+2Y最大为3×7+2×9=39
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