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If A=[{:(1,2,5),(5,1,1),(3,0,4):}] then...

If `A=[{:(1,2,5),(5,1,1),(3,0,4):}]` then find A-2A'.

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The correct Answer is:
`[{:(-1,-8,-1),(1,-1,1),(-7,-2,-4):}]`
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KUMAR PRAKASHAN-MATRICES -PRACTICE WORK
  1. A=[{:(2,3,-1),(1,-2,4):}]andB=[{:(1,4),(2,5),(-1,3):}] then verify tha...

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  2. If A=(1)/(3)[{:(1,2,2),(2,1,-2),(-2,2,-1):}] then show that A A'=A'A=...

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  3. If A=[{:(1,2,5),(5,1,1),(3,0,4):}] then find A-2A'.

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  4. For the matrices A and B, verify that (AB)'=B'A. (i) A=[{:(1),(3),...

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  5. Express the matrix B=[{:(2,-2,-4),(-1,3,4),(1,-2,-3):}] as the sum of...

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  6. Show that all the diagonals elements of a skew symmetric matrix are ze...

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  7. Prove that if A is a square matrix then ,(i) (A+A') is a symmetric met...

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  8. Express the matrix A=[{:(2,3,4),(5,6,-2),(1,4,5):}] as the sum of a s...

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  9. If a matrix A is a symmetric matrix then show that A^(n) is also a sy...

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  10. Using elementary transformations find the inverse of each of the follo...

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  11. Find the inverse of [{:(7,4),(1,-2):}]

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  12. Find the inverse of each of the following matrices [{:(-1,2),(-3,5):}...

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  13. Find adjoint of each of the matrices [{:(0,1,2),(1,2,3),(3,1,1):}]

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  14. Find inverse of [{:(1,2,1),(3,2,3),(1,1,2):}]

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  15. If A=[{:(costheta,sintheta),(-sintheta,costheta):}] then prove that ...

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  16. Find the matrix X such that , X[{:(5,-7),(-2,3):}]=[{:(-16,-6),(7,2)...

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  17. Find the matrix X such that , [{:(2,-1),(1,0),(-3,4):}]X=[{:(-1,-8...

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  18. Find x, if [1" "x" "1][{:(1,3,2),(2,5,1),(15,3,2):}][{:(1),(2),(x):}]=...

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  19. Find the real numbers x and y so that (xI+yA)^(2)=A, where A=[{:(0,1),...

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  20. For square matrices A and B , AB=A and BA =B, then prove that A^(2)=A...

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