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+1 vote
10.2k views
in Trigonometry by (41.5k points)

If A = [(a, 0, 0), (0, a, 0), (0, 0, a)], then |A| |adj A| is equal to

(A) a25

(B) a27

(C) a81

(D) None of these 

1 Answer

0 votes
by (41.3k points)
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Best answer

Answer is (D) None of these

|A||adj A| = |A||A|2 = (a3)3 = a9

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