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Let A=(a(n))(nxxn) and adj (A) =(alpha(i...

Let `A=(a_(n))_(nxxn)` and adj `(A) =(alpha_(ij)`. If `A=[{:(1,2,3),(4,5,4),(4,5,4),(2,3,-1):}]` then what is the value of `alpha_(23)` ?

A

1

B

`-1`

C

8

D

`-8`

Text Solution

Verified by Experts

The correct Answer is:
C
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PUNEET DOGRA-MATRIX-PREV YEAR QUESTIONS
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  3. If A=[{:(1,2),(2,3),(3,4):}] and B=[{:(1,2),(2,1):}] then Which one ...

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  4. If B=[{:(3,2,0),(2,4,0),(1,1,0):}] than what is adjoint of B equal to ...

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  5. If A=[{:(0,1),(1,0):}] then the matrix A is

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  8. Consider the following in respect of matrices A,B and C of same order....

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  9. The system of equation 2x+y-3z=5 3x-2y+2z=5 and 5x-3y-z=16

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  11. If A and B are two invertible square matrices of same order, then what...

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  12. What is the adjoint of the matrix : ({:(cos (-theta),-sin (-theta)),...

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  14. A square matrix A is called orthogonal if.

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  15. If A=({:(1,2),(2,3):}) and A^(2) -KA-I(2)=O," where "I(2) is the 2xx2 ...

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  16. If A is a 2xx3 matrix and AB is a 2xx5 matrix. Then B must be a

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  17. What is the inverse of the matrix A=({:(cos theta, sin theta ,0),(- ...

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  18. If A=[{:(4i-6,10i),(14i,6+4i):}] and K=(1)/(2i), where i= sqrt(-1). Th...

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  19. If A is a square matrix, then the value of adj A^(T)-(adj A)^(T) is eq...

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  20. If a,b,c are non-zero real numbers, then the inverse of the matrix A=[...

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  21. The ad joint of the matrix A= [{:(1,0,2),(2,1,0),(0,3,1):}] is :

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