答案:(1)max z=10x 1 5x 2 s.t. 3x 1 4x 2 ≤9 5x 1 2x 2 ≤8 x 1 ,x 2 ≥0 将问题化为标准型: max z=10x 1 5x 2 s.t. 3x 1 4x 2 x 3 =9 5x 1 2x 2 x 4 =8 x 1 ,x 2 ,x 3 ,x 4 ≥0 单纯形表: 第一步:x 1 =0,x 2 =0,x 3 =9,x 4 =8相当于点(0,0) 第二步:x 1 =8/5,x 2 =0,x 3 =21/5,x 4 =0相当于点(8/5,0) 第三步:x 1 =1,x 2 =3/2,x 3 =0,x 4 =0相当于点(1,3/2) (2) max z=100x 1 200x 2 s.t. x 1 x 2 ≤500 x 1 ≤200 2x 1 6x 2 ≤1200 x 1 ,x 2 ≥0 将问题化为标准型: max z=10x 1 5x 2 s.t. x 1 x 2 x 3 =500 x 1 x 4 =200 2x 1 6x 2 x 5 =1200 x 1 ,x 2 ,x 3 ,x 4, x 5 ≥0 单纯性表 第一步:x 1 =0,x 2 =0,x 3 =500,x 4 =200,x 5 =1200相当于点(0,0) 第二步:x 1 =0,x 2 =200,x 3 =300,x 4 =200,x 5 =0相当于点(0,200) 第三步:x 1 =200,x 2 =400/3,x 3 =500/3,x 4 =0,x 5 =0相当于点(200,400/3)