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If 2A=[{:(2,1),(3,2):}] then what is A^(...

If `2A=[{:(2,1),(3,2):}]` then what is `A^(-1)` equal to ?

A

`[{:(2,-1),(-3,2):}]`

B

`(1)/(2) [{:(2,-1),(-3,2):}]`

C

`(1)/(4) [{:(2,-1),(-3,2):}]`

D

None of these

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PUNEET DOGRA-MATRIX-PREV YEAR QUESTIONS
  1. Consider the following statements: I. The product of two non-zero ma...

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  2. Consider the following statements : I. The matrix ({:(1,2,1),(2,2a,1...

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  3. If 2A=[{:(2,1),(3,2):}] then what is A^(-1) equal to ?

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  4. If A and B are two non-singular square matrices such that AB=A. then w...

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  5. If A=[{:(3,4),(5,6),(7,8):}] and B =[{:(3,5,7),(4,6,8):}], then Which ...

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  6. The inverse of a diagonal matrix is a:

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  7. If the matrix [{:(alpha, 2,2),(-3,0,4),(1,-1,1):}] is not invertible t...

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  8. If the matrix AB is a zero matrix, then which one of the following is ...

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  9. If the sum the matrices [{:(x),(x),(y):}][{:(y),(y),(z):}] and [{:(z),...

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  10. A square matrix [A(ij)] such that a(ij)=0 for I ne j and a(ij)=k where...

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  11. Consider the following statements. I. Every zero matrix is a square ...

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  12. If a matrix A has inverse B and C. then which one of the following is ...

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  13. If A is a square matrix such that A^(2)=l where l is the identity matr...

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  14. What is the order of : [xyz] [{:(a,h,g),(h,b,f),(g,f,c):}][{:(x),(y),(...

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  15. Then sum and product of matrices A and B exist. Which of the following...

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  16. If A=[{:(1,2),(1,1):}] and B = [{:(0,-1),(1,2):}] , then what is the v...

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  17. Consider the following statements with respect to the square matrices ...

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  18. For what value of x does {:(1  {:3 &nbsp {:2:})({:(1,3,0),(3,0,2),(2,0...

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  19. If the matrix A=[{:(2-x,1,1),(1,3-x,0),(-1,-3,-x):}] is singular then ...

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  20. If A=[{:(alpha,0),(1,1)] and B=[{:(1,0),(2,1):}] such that A^(2)=B the...

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