Question 1 :
Question 2 :
Question 3 :
Question 4 :
Question 5 :
Question 6 :
Question 7 :
Question 8 :
Question 9 :
Question 10 :
Question 11 :
Question 12 :
Answers :
1)
2) There is no inverse matrix.
3)
4) There is no inverse matrix.
5)
6)
7)
8) proved
9) proved
10)
11) proved
12) proved and A-1 is
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