Question

Which one of the following is correct statement? *

a. A=10A

b. A1=10

c. A=”10”

d. A$=10​

Answer 1

Answer:

Correct option is C)

Given : A(adj A)=[

10

0

0

10

]=10[

1

0

0

1

]=10 I

We know that, A

−1

=

∣A∣

1

Adj(A)⟹A(adj A)=∣A∣I

⇒∣A∣=10