Re: [線代] 請教3個反矩陣相乘公式

[mack (腦海裡依然記得妳)]

※ 引述《Mopack22926 (阿翔)》之銘言：
: http://upload.lsforum.net/users/public/w1372f371756577-mg3.jpg
: 請教A與?的算法 謝謝
     -1     1
[a b]   = -----[ d -b]
[c d]     ad-bc[-c  a]

         -1        1
[S+1  -1]   = ----------[S+1   1]
[0   S+1]     (S+1)(S+1)[0   S+1]


               1
所求=[2 0]*----------[S+1   1]*[0]
           (S+1)(S+1)[0   S+1] [1]
        1
    =----------[2  0][S+1   1][0]
     (S+1)(S+1)      [0   S+1][1]
         2
    =----------
     (S+1)(S+1)

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