>> A=[5, -1, -1;
      3, 1, -1;
      4, -2, 1];
>> v= [1, 0, 0]';
>> v=A*v

v =

     5
     3
     4

>> v=A*v

v =

    18
    14
    18

>> v=A*v

v =

    58
    50
    62

>> v=A*v

v =

   178
   162
   194

>> v=A*v

v =

   534
   502
   582

>> v=A*v

v =

        1586
        1522
        1714

>> v=A*v

v =

        4694
        4566
        5014

>> v=A*v

v =

       13890
       13634
       14658

>> A= randi(9, 4, 4)

A =

     8     6     9     9
     9     1     9     5
     2     3     2     8
     9     5     9     2

>> v=ones(4,1)

v =

     1
     1
     1
     1

>> v=A*v

v =

    32
    24
    15
    25

>> v=A*v

v =

   760
   572
   366
   593

>> v=A*v

v =

       18143
       13671
        8712
       14180

>> 18143/760

ans =

   23.8724

>> 8712/366

ans =

   23.8033

>> v=A*v

v =

      433198
      326266
      208163
      338410

>> v=A*v

v =

    10342337
     7790565
     4968800
     8080399

>> 10342337/433198

ans =

   23.8744

>> >> A=[5, -1, -1;
      3, 1, -1;
      4, -2, 1];
>> v= [1, 0, 0]';
>> v=A*v

v =

     5
     3
     4

>> v=A*v

v =

    18
    14
    18

>> v=A*v

v =

    58
    50
    62

>> v=A*v

v =

   178
   162
   194

>> v=A*v

v =

   534
   502
   582

>> v=A*v

v =

        1586
        1522
        1714

>> v=A*v

v =

        4694
        4566
        5014

>> v=A*v

v =

       13890
       13634
       14658

>> A= randi(9, 4, 4)

A =

     8     6     9     9
     9     1     9     5
     2     3     2     8
     9     5     9     2

>> v=ones(4,1)

v =

     1
     1
     1
     1

>> v=A*v

v =

    32
    24
    15
    25

>> v=A*v

v =

   760
   572
   366
   593

>> v=A*v

v =

       18143
       13671
        8712
       14180

>> 18143/760

ans =

   23.8724

>> 8712/366

ans =

   23.8033

>> v=A*v

v =

      433198
      326266
      208163
      338410

>> v=A*v

v =

    10342337
     7790565
     4968800
     8080399

>> 10342337/433198

ans =

   23.8744