What is the first question? Did you switch places? Accompany?
If it is transposed, it is.
At:
three
2
1
2
four
2
six
seven
six
A+AT=
six
four
seven
four
eight
nine
seven
nine
12
A-AT=
five
five
-5
-5
AAT=
14
16
38
16
24
66
38
66
12 1
ATA=(AAT)T=
14
16
38
16
24
66
38
66
12 1
The second question. The solution is as follows: Find the rank of the coefficient matrix. r