00:01
Hi there in this question.
00:02
The first sub part is given that a is an n -bine matrix.
00:06
A transpose is equal to negative a.
00:08
And we have to show that determinant of a is equal to negative 1 power n, determine a.
00:12
And in the b part, we have to show that if n is owed, then a is singular using the above result in part a.
00:19
So let's see how we'll do this particular question.
00:22
So in the first part it is given that determinant a is an end -bine matrix.
00:26
So we have a result that is determinant of a.
00:31
Power or determinant k a is equal to determinant k a is equal to k to k to the power n multiplied by determinant of a this is a result related to determinant of matrices that is determinant of k is equal to k power n multiplied by determinant of a where n means it is the order of the matrix a okay order of the matrix a.
01:05
So here we have determined, it's already given that a transpose is equal to negative a.
01:14
So from here we'll be having determinant of, we'll be having that determinant of a transpose is equal to determinant of negative a.
01:29
And that is equal to we'll be having, we can use the above result.
01:34
So negative 1 power n multiplied by determinant a.
01:38
Now we have another result that is determinant of a transpose is equal to determinant of a.
01:47
Therefore, we can rewrite the above expression in the form.
01:51
Determinant of a is equal to negative 1 power n determinant of a.
02:00
So we got the first prove here, hence the proof...