解将线性规划问题化为标准形 mnS=-70x1-120x2 9x1+4x2+x3 360 4x1+5x,+x 200 S·t 3x1+10x2 +x=300 ≥0(j=1,2,…,5) 有现成可行基B1=(P3,P4,P)=l3,B1-=B1, B,=(0,0.0)xEB1b=b=(360,200,300)1解 将线性规划问题化为标准形 minS′= -70x1-120x2 9x1 + 4x2 +x3 = 360 4x1 + 5x2 +x4 = 200 3x1 + 10x2 +x5 = 300 xj≥0 ( j =1, 2, ···,5) 有现成可行基B1 = (P3 , P4 , P5 ) = I3 , B1 -1= B1, = B1 -1b = b = (360, 200, 300)T.        s t 1 1 (0 0 0 CB xB = , , )