Page 36 - Past Year
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34 | P a g e
2 2 4
10. R 4 6 5
4 3 3
1
2 0 0
1
11. k = 2; A 1 1 1
2 10 10
1 1 3
2 5 10
2 2
1
3 0 0 3 3
12. (a) PQ 0 3 0 , P 1 2 1 0
0 0 3 3 3
1 0 1
x
3x 6y 3z 16.5 3 6 3 16.5
y
(b) (i) 6x 3y 6z 21.3 , 6 3 6 21.3
3x 6y 6z 21.0 3 6 6 21.0
z
(ii) k 3, x 1.4, y 1.3 , z 1.5
13. (a) (i) – 4
M 6 M 12 13 M 17
13
11
(ii) M 21 0 M 22 2 M 23 2
M 2 M 5 M 5
31 32 33
6 0 2
(iii) Adj . A 13 2 5
17 2 5
3 1
2 0 2
9 15
1
(b) A 13 1 5 , x 3, y , z
4 2 4 4 4
17 1 5
4 2 4

