推 JohnMash :find determinant 09/29 11:37
※ 編輯: nourri 來自: 75.85.54.26 (10/01 07:56)
題目是
Is the vector [30]
[-1]
[38]
[56]
[62]
a linear combination of
[1] [5] [9] [-2]
[7] [6] [2] [-5]
[1] , [3] , [3] ,[4] ?
[9] [2] [5] [7]
[4] [8] [2] [9]
我想應該是用
[1 5 9 -2 ！ 30]
[7 6 2 -5 ！ -1]
[1 3 3 4 ！ 38]
[9 2 5 7 ！ 56]
[4 8 2 9 ！ 62]
然後刪成reduced row echelon form
但是算了好幾小時 都卡住
因為算出來最後都會跑出很大的數字
要把數字消掉就會有一堆分數
想請問一下這種題目要怎麼算
謝謝
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