If A is a n n matrix, then adj(adj ,A)= - Vidyadip

MCQ

If $A$ is a $n \times n$ matrix, then $adj(adj \,A)$=

A
$|A|{\,^{n - 1}}A$
✓
$|A|{\,^{n - 2}}A$
C
$|A{|^n}n$
D
None of these

✓

Answer

Correct option: B.

$|A|{\,^{n - 2}}A$

b
(b) We know by the fundamental concept that $adj\,(adj\,A) = |A{|^{n - 2}}A$.

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