If A , B and C are square matrices of order 3 and A = 2 , B = 3 and C = 4 , then the value of 3 a d j A B C - 1 is equal to (where, a d j A represents the adjoint matrix of A )

Question

If A , B and C are square matrices of order 3 and A = 2 , B = 3 and C = 4 , then the value of 3 a d j A B C - 1 is equal to (where, a d j A represents the adjoint matrix of A ), 27, 27 4, 81 2, 81

MARKS App · Accepted Answer

3 a d j A B C - 1 = 3 3 a d j A ⋅ B C = 3 3 × A 2 ⋅ B C = 3 3 × 2 2 × 3 4 = 8 1

Search any question & find its solution

Looking for more such questions to practice?