Question

the value of AA^-1 is​

Answer 1

Answer:

AA^-1 = I

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Answer 2

Answer:

if a is square matrix with |a| = 8 then find the value of |aa'|

we know, value of determinant of a matrix and that of transpose are same.

I.e., |a| = |a'|

or, |a||a'| = |a'||a'| = |aa'|

or, |aa'| = |a'|² = |a|² = (8)² = 64

hence, value of |aa'| = 64

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