KCET2020MathematicsDeterminants
If A= ( array lll 0 & 0 & 1 0 & 1 & 0 1 & 0 & 0 array ) , then A⁴ is equal to
Options
- AA
- B2 A
- CI
- D4 A
Correct answer
C. I
Step-by-step solution
We have, A= [ array lll 0 & 0 & 1 0 & 1 & 0 1 & 0 & 0 array ]A²= [ array lll 0 & 0 & 1 0 & 1 & 0 1 & 0 & 0 array ] [ array lll 0 & 0 & 1 0 & 1 & 0 1 & 0 & 0 array ]= [ array lll 1 & 0 & 0 0 & 1 & 0 0 & 0 & 1 array ]A⁴=A² A²= [ array lll 1 & 0 & 0 0 & 1 & 0 0 & 0 & 1 array ] [ array lll 1 & 0 & 0 0 & 1 & 0 0 & 0 & 1 array ]= [ array lll 1 & 0 & 0 0 & 1 & 0 0 & 0 & 1 array ]=I