If A is a non singular matrix of order 3 and |A| = 3 then find |2A| ?
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0
Answer:
adj(B)∣=∣B∣
n−1
if B=A
3
then
∣
∣
∣
∣
adj(A)
3
∣
∣
∣
∣
=
∣
∣
∣
A
3
∣
∣
∣
2
=∣A∣
6
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