6. If A is an nth order square matrix, then Adj (kA)
is _______. Ans: k
n−1
(Adj A)
7. If the system AX=B is consistent then for
unique solution, A must be a _______ matrix.
Ans: Nonsingular
8. The matrix
104
523
072
−
⎡⎤
⎢⎥
⎢⎥
⎢⎥
⎣⎦
is a/an _______ matrix.
Ans:
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