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The co-factor of elements of the second ...

The co-factor of elements of the second row of `[[1, 2, 3], [-4, 3, 6], [2, -7, -39]]` are

A

`4, 5, 6`

B

`-3, 11, -39`

C

`11, 3, -39`

D

`57, -45, 11`

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The correct Answer is:
D
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NIKITA PUBLICATION-MATRICES-MULTIPLE CHOICE QUESTIONS
  1. IfA==[[1, -1, 3], [2, 1, 0], [3, 3, 1]], then first 3R3 and then C3 to...

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  2. The co-factor of -4 and 9 in [[-1, -2, 3], [-4, -5, -6], [-7, 8, 9]] ...

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  3. The co-factor of elements of the second row of [[1, 2, 3], [-4, 3, 6],...

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  4. If A=[[5, 6, 3], [-4, 3, 2], [-4, -7, 3]], then co-factor of the eleme...

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  5. The co-factors of the elements of second row of the [[1, 3, -2], [4, -...

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  6. The co-factors of the elements of third row of [[1, -1, 2], [3, 1, 4],...

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  7. The co-factors of the elements of the first column of [[1, 1, -2], [2,...

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  8. The co-factors of the elements of third column of [[4, 3, 1], [1, 3, 2...

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  9. If A=[[1, 2, 3], [2, 3, 2], [1, 2, 2]], then

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  10. Matrix of co-factors of the matrix [[-1, 2],[ -3, 4]] is

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  11. Matrix of co-factors of the matrix [[1,2],[ 3, 4]] is

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  12. Matrix of co-factors of the matrix [[1, 3],[ 4, -1]] is

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  13. Matrix of co-factors of the matrix [[1, -1, 2], [-2, 3, 5], [-2, 0, -1...

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  14. Matrix of co-factors of the matrix [[1, 0, 2], [-2, 1, 3], [0, 3, -5]]...

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  15. If A=[[2, 1], [4, 2]], then

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  16. If A=[[1, 0],[0, 1]], then

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  17. If A=[[1, 1],[1, 1]], then

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  18. If A=[[1, 2], [3, 3]], then

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  19. If A=[[2, 3], [10, 15]], then

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  20. If A=[[costheta, sintheta], [-sintheta, costheta]], then

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