Q39 of 58 Page 77

Fill in the blanks

If A is invertible matrix of order 3 × 3, then |A-1|= ____.

If A is invertible matrix of order 3 × 3, then |A-1| = |A|-1

Explanation:


Given A is invertible matrix of order 3 × 3.


We know that AA-1 = I.


⇒|A||A-1| = 1



|A|-1


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