行列式证明题
a+bab0...001a+bab...0001a+b...00..................000...a+bab=(a^n+1-b^n+1)/a-b000......
a+b ab 0 ... 0 0
1 a+b ab ... 0 0
0 1 a+b ... 0 0
... ... ... ... ... ...
0 0 0 ... a+b ab =(a^n+1-b^n+1)/a-b
0 0 0 ... 1 a+b 展开
1 a+b ab ... 0 0
0 1 a+b ... 0 0
... ... ... ... ... ...
0 0 0 ... a+b ab =(a^n+1-b^n+1)/a-b
0 0 0 ... 1 a+b 展开
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