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If A is a square matrix of order n, wher...

If A is a square matrix of order n, where `|A|=5 and |A(adjA)|= 125`, then n=

A

`3`

B

`2`

C

`1`

D

`4`

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The correct Answer is:
A
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NIKITA PUBLICATION-MATRICES-MULTIPLE CHOICE QUESTIONS
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  2. If A is a square matrix of order 2times2 and |A|=5, then |A(adjA)|=

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  3. If A is a square matrix of order n, where |A|=5 and |A(adjA)|= 125, th...

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  4. If A is a non-singular matrix of order 3, then adj(adj(A)) is equal to

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  5. If A=[[2, -1, 1], [1, 2, 1], [-1, 1, 3]], then |adj(adjA)|=

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  6. If A=[{:(1,-1,1),(0,2,-3),(2,1,0):}] and B=(adjA) and C=5A, then find ...

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  7. If A=[[1, 2, 3], [1, 4, 9], [1, 8, 27]], then the value of |adjA| is

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  8. If P=[[1, alpha, 3], [1, 3, 3], [2, 4, 4]] is the adjoint of 3times3 m...

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  9. If A is a matrix of order 3 and |A|=8, then |adjA|=

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  10. For a 3xx3 matrix A if |A|=4, then|Adj.A| is (A) Both A and R are true...

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  11. If A is a square matrix of order 3 and |adjA|=25, then |A|=

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  12. If A is a square matrix of order 3 such that A^(-1) exists, then |adjA...

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  13. If A=[[a, 0, 0], [0, a, 0], [0, 0, a]], then |adjA|=

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  14. If A=[[a, 0, 0], [0, a, 0], [0, 0, a]], then |A||adjA|=

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  15. If A=[[3, 0, 0], [0, 3, 0], [0, 0, 3]], then |A||adjA|=

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  16. If A is a square matrix of order 3 and |A|=-2, then the value of the d...

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  17. If A=[[0, 1, -1], [2, 1, 3], [3, 2, 1]], then (A(adjA)A^(-1))A=

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  18. If for the matrix A, A^(3)=I, then A^(-1)=

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  19. If for the matrix A, A^(5)=I, then A^(-1)=

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  20. If A and B are square matrices of the same order and AB=3I, then A^(-1...

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