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If for a square matrix A,AB=BA = I, then...

If for a square matrix A,AB=BA = I, then inverse of B is

A

`1/A`

B

B

C

A

D

None of these

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MODERN PUBLICATION-MATRICES-EXERCISE
  1. If A is a non-singular matrix of ordern, then |adj A| is equal to

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  2. If 2{:[(x,z),(2,0)]+3[(1,-1),(0,2)]=[(9,15),(4,6)], then the values of...

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  3. If for a square matrix A,AB=BA = I, then inverse of B is

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  4. If A is of order mxxn, B is of order pxxq such that AB is defined, the...

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  5. If A + B = C, where A and B are matrices of order 2 xx 3, then order o...

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  6. The number of all possible matrices of order 3xx3 with each entry 0 o...

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  7. If x[[2],[3]] + y[[-1],[1]] = [[10],[5]] , find the values of x and y.

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  8. Show that a matrix, which is both symmetric and skew symmetric, is a z...

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  9. If A be a matrix of order 3xx4, then elements of A, are

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  10. A 2xx2 matrix A = [a(ij)], where a(ij) = (i+j)^2 is

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  11. If AB=C, where B and C are matrices of orders 6xx5, then the order of ...

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  12. If D = [a(ij)](mxxn) is a rectangular matrix, then

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  13. If A = {:[(cosalpha, -sinalpha),(sinalpha, cosalpha)], then A + A' = I...

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  14. If A is matrix of 4 xx 3 then each column of A contains

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  15. If matrix A is of order 4 xx 3, then each row of matrix A contains ele...

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  16. If A is matrix of a order 2 xx 3 and B is a matrix of order 3 xx 2, t...

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  17. If A is a matrix of order 3 xx 4, then each column of matrix A contain...

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  18. Which of the given values of x and y make the following pair of matric...

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  19. If A = {:[(1,0),(1,1)] and A^2 = aA + bI, then (a,b)

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  20. If A = {:[(2-k,2),(1,3-k)] is a singular matirx, then the value of 5k-...

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