Question

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If A is a matrix of order 3 x 3, then det(3A) = 1
(B) 27|A|
(A) 3|A|
(C) 1/3|A|
(D) None of these​

Answer 1

Answer:

(B) 27|A|

Step-by-step explanation:

Since A is a matrix of order 3×3, therefore 3 is common from each row or column in determinant.

Hence it is 3*3*3|A|=27|A|.

Hope you have got it