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Let A =[(1,-1,1),(2,1,-3),(1,1,1)] an...

Let `A =[(1,-1,1),(2,1,-3),(1,1,1)]` and `10B=[(4,2,2),(-5,0,alpha),(1,-2,3)]`. If B is the inverse of A, then `alpha` is :

A

0

B

1

C

2

D

5

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The correct Answer is:
b
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Let A=[(1,-1,1),(2,1,-3),(1,1,1)] and B=[(4,2,2),(-5,0,alpha),(1,-2,3)] If B is the inverse of matrix A , then alpha= (A) 2 (B) -2 (C) 5 (D) -5

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TARGET PUBLICATION-MATRICES-COMPETITIVE THINKING (Inverse off a matrix )
  1. If A=[(2x,0),(x,x)] and A^(-1)=[(1,0),(-1,2)] then x equals to

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  2. If A=[(x,-2),(3,7)] and A^(-1)=[(7/34,1/17),((-3)/34,2/17)],then the v...

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  3. Let A =[(1,-1,1),(2,1,-3),(1,1,1)] and 10B=[(4,2,2),(-5,0,alpha),(...

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  4. If A=[(5,4),(3,2)] then A^(-1) is equal to

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  5. The inverse of matrix A=[[2, -3], [-4, 2]] is

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  6. If U=[((1)/(sqrt2),(-1)/(sqrt2)),((1)/(sqrt2),(1)/(sqrt2))], then U^(-...

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  7. If A=[{:(a, b), (c, d):}] " then " A^(-1) = .

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  8. The invrse of the matrix [(2,0,0),(0,3,0),(0,0,4)] is

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  9. If A=[((k)/(2),0,0),(0,(l)/(2),0),(0,0,(m)/(4))] and A^(-1)= [((1)/(2)...

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  10. What is the inverse of A=[{:(0,0,1),(0,1,0),(1,0,0):}]?

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  11. If A=[(1,-1,0),(1,0,0),(0,0,-1)], then A^(-1) is

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  12. The inverse of the matrix [(1,0,0),(3,3,0),(5,2,-1)] is

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  13. The inverse matrix of A=[(0,1,2),(1,2,3),(3,1,1)] is

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  14. The inverse of the matrix [(1,0,0),(a,1,0),(b,c,1)] is (A) [(1,0,0),(-...

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  15. If A=[(3,-3,4),(2,-3,4),(0,-1,1)], then A^(-1)=

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  16. if A=[a(ij)](2*2) where a(ij)={i+j , i!=j and a(ij)=i^2-2j ,i=j then A...

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  17. The element of second row and third column in the inverse of [[1, 2, 1...

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  18. The element in the first row and third column of the inverse of the ma...

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  19. If A=[(0,1,2),(1,2,3),(3,1,1)], then the sum of the all the diagonal e...

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  20. If matrix A=[(1,2),(4,3)] such that Ax =I then x=

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