(参考)[初投稿]質問・python 掃き出し法
https://qiita.com/snq7amf522dvzpjbwshb/items/5c267d8286857eda9a71
wolframalphaで
[3,1,1,2],[5,5,3,4],[2,0,6,2],[1,3,2,1]
https://ja.wolframalpha.com/input/?i=%5B3%2C1%2C1%2C2%5D%2C%5B5%2C5%2C3%2C4%5D%2C%5B2%2C0%2C6%2C2%5D%2C%5B1%2C3%2C2%2C1%5D
逆数:
1/8(22 | -14 | -2 | 16
1 | -1 | -1 | 4
3 | -3 | 1 | 4
-31 | 23 | 3 | -28)
小数の表記:
(2.75 | -1.75 | -0.25 | 2
0.125 | -0.125 | -0.125 | 0.5
0.375 | -0.375 | 0.125 | 0.5
-3.875 | 2.875 | 0.375 | -3.5)