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Question
If d is the determinant of a square matrix A of order n, then the determinant of its adjoint is _____________ .
Options
dn
dn−1
dn+1
d
Solution
dn−1
We know,
\[\left| adjA \right| = \left| A \right|^{n - 1}\]
\[\Rightarrow \left| adjA \right| = d^{n - 1}\]
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