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UPSC NDA II 2024 Mathematics Paper

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Question Numbers: 49-50
Direction : Consider the following for the items that follow :
Let A=[

3	−3	4
2	−3	4
0	−1	1

]

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Question : 50

Total: 120

What is A^-1 equal to?

[
1 −1 0
−2 3 −4
−2 3 −3
]
[
1
2
−
1
2
0
−1
3
2
−2
−1
3
2
−
3
2
]
[
2 −2 0
−4 6 −8
−4 6 −6
]
[
1∕5 −
1
5
0
−2/5
3
5
−
4
5
−2/5
3
5
−
3
5
]

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