0103n阶行列式-行列式-线性代数∣ a 11 a 12 ⋯ a 1 n a 21 a 22 ⋯ a 2 n ⋯ ⋯ ⋯ ⋯ a n 1 a n 2 ⋯ a n n ∣ \begin{vmatrix}a_{11}&a_{12}&\cdots&a_{1n}\\a_{21}&a_{22}&\cdots&a_{2n}\\\cdots&\cdots&\cdots&\cdots\\a_{n1}&a_{n2}&\cdots&a_{nn}\\\end{vmatrix} a11a21⋯an1a12a22⋯an2⋯⋯⋯⋯a1na2n⋯ann n 2 n^2