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Q.

The inverse of [ 1     2  −3 0     1     2 0     0     1]  is

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a

[ 1   −2   −7 0      1   −2 0      0      1]

b

[ 1     2   −7 0     1   −2 0     0      1]

c

[ 1     2   −7 0     1      2 0     0      1]

d

[ 1   −2      7 0      1   −2 0     0      1]

answer is D.

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Detailed Solution

A=[12−3012001] Adj A= [1−2701−2001],  detA=1 A−1 = [1−2701−2001]
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