Q.
If A is a non-singular matrix, then
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a
|A−1|=|A|
b
|A−1|=A−1
c
|A−1|=0
d
|A−1|==1|A|
answer is D.
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Detailed Solution
Since, |A|≠0, therefore A−1 exist such that AA−1=I=A−1A ⇒ |AA−1|=|I| ⇒ |A||A−1|=1 ⇒|A−1|=1|A|
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