作者Honor1984 (奈何上天造化弄人？)
看板Math
标题Re: [中学] 矩阵一题
时间Mon Jun 26 15:03:02 2023
※ 引述《night72 (Raxaday)》之铭言：
: 请教各位先进这题
: https://i.imgur.com/J04UHNw.jpg
(a-b)X + b(X + Y) = A
=> X = (1/(a-b)) [1 - b - 1]
[ 2 4 - b]
a(X + Y) + (b - a)Y = A
=> Y = (-1/(a - b)) [1 - a -1 ]
[ 2 4 - a]
-XY = O
=> a + b = 5
(1 - b)(1 - a) - 2 = 0
=> ab = 6
=> (a, b) = (3, 2)
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