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The adjoint of the matrix A= [{:( 1,2),(...

The adjoint of the matrix `A= [{:( 1,2),( 3,-5) :}]` is

A

`[{:( -5,-2),( -3,1):}]`

B

` [{:( 5,2),( 3,-1) :}]`

C

` [{:( 5,-2),( 3,-1) :}]`

D

` [{:( 5,-2),( -3,-1):}]`

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The correct Answer is:
A, B, D
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FIITJEE-MATRICES -SOLVED PROBLEM
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  2. If A and B are square matrices of order 3, then

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  3. If A and B are any two square matrices of the same order than ,

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  4. IF A = [{:( -2,3,-1),( -1,2,-1),( -6,9,-4) :}] and B = [{:( 1,3,-1),(...

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  5. If A=[{:( 1,-tanx ),( tanx ,1):}] then the value of [A^(T) A^(-1) ] ...

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  6. If A = [{:( alpha , 2),( 2,alpha ) :}] and |A^(3) | = 125 then the val...

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  7. A= [{:( 1,0,0) ,( 0,1,1) , ( 0,-2,4) :}] ,I= [{:( 1,0,0) ,( 0,1,0),( 0...

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  8. If A is a square matrix of order 5 and 9A^(-1) then [adj (adj AJJ] (...

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  9. The set of natural numbers N is partitioned into arrays of rows and co...

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  10. For what value of x, the matrix [{:( 3-x,2,2),( 2,4-x,1),(-2,-4,-1-x)...

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  11. The adjoint of the matrix A= [{:( 1,2),( 3,-5) :}] is

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  12. The system AX = B of n equation in n unknown has infinitely many solut...

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  13. The number of matrices in A is

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  14. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  15. Let A be the set of all 3xx3 symmetric matrices all of whose either 0 ...

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  16. Let A be an mxxn matrix. If there exists a matrix L of type nxxm such ...

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  17. The number of right inverses for the matrix [{:( 1,-1,2),( 2,-1,1):}]

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  18. Let A=[{:(x^(2),6,8),(3,y^(2),9),(4,5,z^(2)):}],B=[{:(2x,3,5),(2,2y,6)...

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  19. if Aa n dB are squares matrices such that A^(2006)=Oa n dA B=A+B ,t h ...

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  20. If A=[1 0-1 7] , find k such that A^2-8A+k I=O .

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