作者huskybaby (哈士奇)
看板Grad-ProbAsk
标题Re: [商管] [作业研究]-想请教线性规划的问题。
时间Tue Oct 20 22:05:36 2009
※ 引述《iyenn (晓风)》之铭言:
: ※ 引述《huskybaby (哈士奇)》之铭言:
: : which of the following questions are TRUE or FALSE?Why?
: : (1)When the optimal solution of a LP model is over determined, it means at least one of the constraints is redundant and vice versa.
: : (2)the system BX=b has infinity of solutions if B is singular, and b is dependent relative to the vectors of B.
: : 这两题不太懂在问什麽,有人会解这两小题吗?
: 若B是奇异矩阵and b与B之向量为线性相关,则x有无限多解,T/F
: ans:T
: B非奇异矩阵
: 则可能有无解or无限组多解
: rank(B|b)=rank(B)=m
: rank(B|b)=/=rank(B)则无解
可是我讲义的解答写
ans:F
应是b与B inverse相关。
所以到底是谁对阿?不太懂这个解答的意思。
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1F:→ iyenn:b与B的行向量相依才会有解,觉得是对的耶xd 10/21 13:23