Question

If A is a square matrix of order 3 and |A|=5, find |A^1|​

Answer 1

Step-by-step explanation:

If A is of order 3 then,A

−

1 is also of order 3.

Now, det(cA)=c

n

( detA) where n is the order of the matrix.

And, det A=

detA

−1

1

Thus det[(2A)

−1

]=2

3

det[A]

and det[A

−1

]=

8.5

1

=

40

1

Answer 2

Answer:

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