UPSC NDA II 2015 Mathematics Solved Paper

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Question : 8 of 120

Marks: +1, -0

If A=[

1	1	−1
2	−3	4
3	−2	3

] and B=[

−1	−2	−1
6	12	6
5	10	5

] then which of the following is/are correct
1. A and B commute
2. AB is a null matrix
Select the correct answer using the code given below:

[NDA II 2015]

1 only
2 only
Both 1 and 2
Neither 1 nor 2

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