运筹学,单纯形法求解。 maxz=2x1+x2+x3 st:4x1+2x2+2x3≥4 2x1+4x2≤20 4x1+8x2+2x3≤1 50
6x1,x2,x3≥0maxz=2x1+x2+x3st:4x1+2x2+2x3≥42x1+4x2≤204x1+8x2+2x3≤16...
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x1,x2,x3≥0
maxz=2x1+x2+x3 st:4x1+2x2+2x3≥4 2x1+4x2≤20 4x1+8x2+2x3≤16 展开
x1,x2,x3≥0
maxz=2x1+x2+x3 st:4x1+2x2+2x3≥4 2x1+4x2≤20 4x1+8x2+2x3≤16 展开
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郭敦顒回答:
maxz=2x1+x2+x3
st:4x1+2x2+2x3≥4 (1)
2x1+4x2≤20 (2)
4x1+8x2+2x3≤1 (3)
(3)-(2)得2x3≤-39,
x3≤-19.5
4x1+2x2+2x3=4,4x1+8x2+2x3=1时,
6x2=-3,x2=-0.5代入(2)得,2x1≤18,x1≤9
将x1=9,x2=-0.5,x3=-19.5代入目标值得,
maxz=2x1+ x2+ x3=18-0.5-19.5=-2,
maxz=-2。
maxz=2x1+x2+x3
st:4x1+2x2+2x3≥4 (1)
2x1+4x2≤20 (2)
4x1+8x2+2x3≤1 (3)
(3)-(2)得2x3≤-39,
x3≤-19.5
4x1+2x2+2x3=4,4x1+8x2+2x3=1时,
6x2=-3,x2=-0.5代入(2)得,2x1≤18,x1≤9
将x1=9,x2=-0.5,x3=-19.5代入目标值得,
maxz=2x1+ x2+ x3=18-0.5-19.5=-2,
maxz=-2。
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