例242 maxf(r)=x,+5x2+3x 3+4x4 2x1+3x+x2+2xA≤800 5x1+4x2+3x3+4x4≤1200 st 3x1+4x2+5x3+3x4≤1000 x1,x2,x2,xA1≥0 Xr b 1534000 0x5100140-13/4011/4-1 4x4200202 01 5x2100-3/4111400-3/41 13004.255575400.251 crx-3250-27500-0.25-14 例2.4.2 x1 x2 x3 x4 x5 x6 x7 CB XB b 1 5 3 4 0 0 0 0 x5 100 1/4 0 -13/4 0 1 1/4 - 1 4 x4 200 2 0 - 2 1 0 1 - 1 5 x2 100 -3/4 1 11/4 0 0 -3/4 1 1300 4.25 5 5.75 4 0 0.25 1 cj - zj -3.25 0 -2.75 0 0 -0.25 - 1