1 1 1X1 1 1A)   0 B)  (X1)(X 1)3 C)  (X21)(X2 1) D)  (X 1) (2 X1)2

Câu 91. Tính định thức:

1 1

1

x

1 1 1

a)

 

0

b)

 

(

x

1)(

x

1)

3

c)

 

(

x

2

1)(

x

2

1)

d)

 

(

x

1) (

2

x

1)

2

.

x

x

1

1 1

2

2

1 1

 

.