Author : Akash Kumar Singh
December 30, 2024
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Explanation:
(b)
|A^3−3A^2 − 5A| = 0 (given)
= |A (A^2 − 3A − 5I)| = 0
= |A||A^2 − 3A − 5I| = 0
= |A| = 0
= |A| = a × 1 – 2 × 3 = 0
Therefore, a = 6 Ans.
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