00:01
In this question, matrix a is given by 627549133.
00:11
Now, cofactor of matrix a is given by cij equals to minus 1 raised to the power i plus j mij where m is determinant.
00:27
Now, c11 is given by minus 1 raised to the power 1 plus 1 and leaving this where 6 is present.
00:41
So, leaving this column and this row.
00:44
So, it will be 4933.
00:47
So, determinant of 4933.
00:51
So, minus 1 raised to the power 2 and here it will be 4 3's are 12 minus 9 3's are 27.
01:01
So, this will be plus 1.
01:03
So, plus 1 multiplied by minus 15.
01:08
So, this is equals to minus 15.
01:11
Then c12 that will be minus 1 raised to the power 1 plus 2 and leaving this column and this row.
01:22
So, this will be 5193.
01:24
So, here it will be 5193.
01:29
So, this will be minus 1 raised to the power 3 odd power.
01:34
So, this will be negative and 3 5's are 15 minus 9.
01:39
So, this will be equals to minus 6.
01:42
Then c13 which is equals to minus 1 raised to the power 1 plus 3 and here it will be 5 4 1 3.
01:54
Here it will be determinant of leaving this, leaving this, this column and this row.
02:01
So, 5 1 4 3.
02:03
So, here determinant of this will be here the power of minus 1 is even power.
02:09
So, it will be plus 1 and 5 3's are 15 minus 4.
02:14
So, this is equals to plus 11.
02:17
Then next one is c21 which is equals to minus 1 raised to the power 2 plus 1.
02:25
This will be 2373.
02:29
So, here on simplifying this will be minus 1 and 3 2's are 6 minus 3 7's are 21...