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