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Show that the matrix A=[[1,2,2],[2,1,2],...

Show that the matrix `A=[[1,2,2],[2,1,2],[2,2,1]]` satisfies the equation `A^2-4A-5I_3=0` and hence find `A^(-1)`

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RD SHARMA ENGLISH-ADJOINTS AND INVERSE OF MATRIX-All Questions
  1. Find the adjoint of matrix A=[a(i j)]=[[1, 1, 1],[ 2, 1,-3],[-1, 2, 3]...

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  2. For the matrix A=[[3 ,1],[ 7, 5]], find x and y sot that A^2+x I+y A...

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  3. Show that the matrix A=[[1,2,2],[2,1,2],[2,2,1]] satisfies the equatio...

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  4. If A=[(cosalpha,-sinalpha,0),(sinalpha,cosalpha,0),( 0, 0, 1)], find a...

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  5. If A=[[1,tanx],[-tanx,1]], show that A^T A^(-1)=[[cos2x,-sin2x],[sin2...

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  6. If matrix A=[02 y z x y-zx-yz] satisfies AT = A-1, then find the valu...

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  7. Find a 2x2 matrix B such that B[1-2 1 4]=[6 0 0 6]

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  8. Find the matrix A satisfying the matrix equation [2 1 3 2]A[-3 2 5-3]...

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  9. If A is a symmetric matrix, write whether A^T is symmetric or skew-sym...

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  10. Using elementary row transformation find the inverse of the matrix A=[...

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  11. Let A be a non-singular matrix. Show that A^T A^(-1) is symmetric if...

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  12. If A=[[cosalpha,sinalpha],[-sinalpha,cosalpha]] is such that A^T=A^(-1...

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  13. Find the adjoint of matrix A=[a(i j)]=[(p, q),( r, s)] .

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  14. Find the adjoint of matrix A=[a(i j)]=|[1, 1, 1], [2, 1,-3],[-1, 2, ...

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  15. Compute the adjoint of the matrix A given by A=[[1, 4, 5], [3, 2, 6]...

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  16. Find the inverse of the matrix |[2,-1], [3, 4]| .

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  17. Find the inverse of the matrix A=[[8, 4, 2],[ 2, 9, 4],[ 1, 2, 8]] .

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  18. If A is an invertible matrix of order 3 and |A|=5 , then find |a d ...

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  19. If A is an invertible matrix of order 3xx3 such that |A|=2 . Then, f...

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  20. If A is an square matrix of order 3 such that |A|=2 , then write the...

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