1)

The value of the determinant Δ = |1430129122| is


A) 2

B) 4

C) 6

D) 8

Answer:

Option C

Explanation:

Δ = |1430129122|

=  1(12 x 2 -2 x 9)-4 (0 x 2 - 1 x 9) + 3(0x 2 - 1 x12) = 1(24 - 18) - 4(0 - 9) + 3(0 - 12)

= 6 +36 - 36 = 6