一个\(n\)阶的行列式\(M\)可以写成一行(或一列)的元素与对应的代数余子式的乘积之和,叫作行列式按一行(或一列)的展开:
\(\begin{align}\det {M}&=\sum _{i=1}^{n}m_{i;j}C_{i,j}=\sum _{i=1}^{n}m_{i;j}(-1)^{(i+j)} M_{ij}\\\det {M}&=\sum _{j=1}^{n}m_{i;j}C_{i,j}=\sum _{j=1}^{n}m_{i;j}(-1)^{(i+j)} M_{ij}\end{align}\)
一个\(n\)阶的行列式\(M\)可以写成一行(或一列)的元素与对应的代数余子式的乘积之和,叫作行列式按一行(或一列)的展开:
\(\begin{align}\det {M}&=\sum _{i=1}^{n}m_{i;j}C_{i,j}=\sum _{i=1}^{n}m_{i;j}(-1)^{(i+j)} M_{ij}\\\det {M}&=\sum _{j=1}^{n}m_{i;j}C_{i,j}=\sum _{j=1}^{n}m_{i;j}(-1)^{(i+j)} M_{ij}\end{align}\)
status | not learned | measured difficulty | 37% [default] | last interval [days] | |||
---|---|---|---|---|---|---|---|
repetition number in this series | 0 | memorised on | scheduled repetition | ||||
scheduled repetition interval | last repetition or drill |