数学试题讲解

n

阶行列式

{| \begin{array}{cccccc} a & b & 0 & \dots & 0 & 0 \\ 0 & a & b & \dots & 0 & 0 \\ 0 & 0 & a & \dots & 0 & 0 \\ \dots & \dots & \dots & \dots & \dots & \dots \\ 0 & 0 & 0 & \dots & a & b \\ b & 0 & 0 & \dots & 0 & a \end{array} |}_{n} =