计算n阶行列式一、123...n二、750...00三、123...n-1n-103...n275...00133...n-1n.027...00125...n-1n-1-2-3...0..000...27123...2n-3n123...n-12n-1

Question

计算n阶行列式
一、 1 2 3...n 二、7 5 0...0 0 三、1 2 3...n-1 n
-1 0 3...n 2 7 5...0 0 1 3 3...n-1 n
.0 2 7...0 0 1 2 5...n-1 n
-1 -2 -3...0 ..
0 0 0...2 7 1 2 3...2n-3 n
1 2 3...n-1 2n-1

Answer 1

一、 1 2 3···n
0 2 6···2n
············
0 0 0 n
结果为n的阶层.步骤是把第一行一次加到第二行,第三行,第n行