x – y + z = 4
3x + 2y = 5
x – 2y – z = 3
2
2x + y – 3z = 0
3y – 5z = 9
x + y + z = 2
13 2x + 3y +3 z = 5
14 x – y + 2z = 7
x – 2y + z = – 4
3x + 4y – 5z = – 5
3x – y – 2z = 3
2x – y + 3z = 12
Rationalised 2023-24
 98
MATHEMATICS
15 If  A = 
2
–3
5
3
2
– 4
1
1
–2










, find A–1