Let 
then 
is equal to
We have,
Dividing R2 and R3 by ‘t’
Expanding along the first row, we get
= (1)(1 – 2) + (1)(2 – 1)
= - 1 + 1
= 0
Hence, the correct option is (A)
30
Let then is equal to
We have,
Dividing R2 and R3 by ‘t’
Expanding along the first row, we get
= (1)(1 – 2) + (1)(2 – 1)
= - 1 + 1
= 0
Hence, the correct option is (A)