Q.

Let A be an invertible matrix, which of the following is not true?

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a

(A')-1=(A-1)'

b

A-1=|A|-1

c

(A2)–1 = (A–1)2

d

None of these

answer is B.

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Detailed Solution

A–1 = |A|–1 is not true, as L.H.S. is a matrix and R.H.S. is a number.
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