计算行列式| xaaaaxaaaaxaaaax |.
问题描述:
计算行列式|
|.
x
a
a
a
a
x
a
a
a
a
x
a
a
a
a
x
答
行列式
=
.
x
a
a
a
a
x
a
a
a
a
x
a
a
a
a
x
.
=
.
x
a
a
a
a−x
x−a
0
0
a−x
0
x−a
0
a−x
0
0
x−a
.
=(x+3a)(x-a)3
.
x+3a
a
a
a
0
x−a
0
0
0
0
x−a
0
0
0
0
x−a
.