作者iyenn (晓风)
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Mon Oct 19 03:01:11 2009
※ 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
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