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For a invertible matrix A if A (ad...

For a invertible matrix `A ` if ` A (adj A) =[(10,0),(0,10)]` then `|A|=`

A

100

B

`-100`

C

10

D

`-10`

Text Solution

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The correct Answer is:
c
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TARGET PUBLICATION-MATRICES-COMPETITIVE THINKING (Inverse off a matrix )
  1. If d is the determinant of a square matrix A of order n , then the ...

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  2. If A={:[(4,2),(3,4)],:}" then: "|adj,A|=

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  3. For a invertible matrix A if A (adj A) =[(10,0),(0,10)] then |A...

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  4. If A is a matrix of order 3, such that A(adj A)=10I, then |adj A|=

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  5. If the adjoint of a 3 3 matrix P is 1 4 4 2 1 7 1 1 3 , then the po...

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  6. Let A be a 2xx2 matrix Statement -1 adj (adjA)=A Statement-2 abs(a...

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  7. adj AB -(adj B)(adj A) =

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  8. If A=[(2x,0),(x,x)] and A^(-1)=[(1,0),(-1,2)] then x equals to

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

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

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

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

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

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

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

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

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

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

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

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

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