[理工] [線代]-rank

看板Grad-ProbAsk作者時間16年前 (2010/02/27 22:52), 編輯推噓1(103)
留言4則, 1人參與, 最新討論串1/5 (看更多)
What is the relation between the rank r and the dimension of A when the → → number of solutions to Ax = b is (10%) → (a) 0 or 1, depending on b. → (b) ∞, independing of b. → (c) 0 or ∞, depending on b. → (d) 1, regardless of b. 煩請高手解釋一下這題要怎麼解 不太懂意思 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 219.71.143.187

02/27 23:59, , 1F
我認為如果A可逆,就可不管,有唯一解
02/27 23:59, 1F

02/27 23:59, , 2F
另外如果A不可逆,就要看b
02/27 23:59, 2F

02/28 00:00, , 3F
若b在R(A)中,則無限多解 若不在則無解
02/28 00:00, 3F

02/28 00:05, , 4F
所以我猜c d
02/28 00:05, 4F
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