CBSE Class XII Maths 2017 Question Papers with Solutions

Question : 1

Total: 29

If for any 2 x 2 square matrix A, A (adj A) = [

8	0
0	8

], then write the value of |A|

Solution:

A (adj A) = |A| I
|A| I = 8 |

1	0
0	1

| = 81
⇒ det (A) = |A| = 8

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