Question

Find the Adjoint of matrix  

          

Solution

Correct option is

Co-factor elements of 1st row are respectively

       of a11                  of a12              of a13  

     

Co-factor of elements of 2nd row are respectively.  

        of a21                of a22                   of a23

    

Co-factor of elements of 3rd row are respectively  

        of a31                 of a32            of a33

      

From a mixture by replacing the elements of A by the co-factor of |A|.  

        

  

        .

SIMILAR QUESTIONS

Q1

Find the rank of the matrix

         

Q2

Find the inverse of the matrix

        

Q3

 

The value of λ for which the matrix product

      

is an identity matrix 

Q4

If A and B are two matrix such that AB = B and BA = A, then A2 + B2 =

Q5

If A and B are square matrices of size n × n such that A2– B2– = (A – B)(AB), then which of the following will be always true  

Q7

Then the value of α is

Q8

If  be the complex cube roor of unity and , then A70 is equal to

Q9

If A diag [d1d2d3], then An is equal to

Q10

 

If B is the inverse of A, the  is