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if for any 2*2 square matrix A , A(adjA)...

if for any `2*2` square matrix A , `A(adjA)=[[8 , 0] , [0 , 8]]` then write the value of `det.A`

Answer

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Knowledge Check

  • For a invertible matrix A, if A(adjA)=[[10, 0], [0, 10]] , then |A|=

    A
    `100`
    B
    `-100`
    C
    `10`
    D
    `-10`

  • For any 2XX2 matrix A,if A (adjA) =[(10,0),(0,10)] , then |A| is equal to

    A
    0
    B
    10
    C
    20
    D
    100

  • If A is a square matrix, then adj(A')-(adjA)'=

    A
    `I`
    B
    `0`
    C
    `2(adjA)`
    D
    `2(adjA')`

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