Question: Let A e2 + 12, B = = 1 2 (1+). Consider, 1. AB=0 thus BA = 0 also. 2. ABBA # 0. 3.

Let A e2 + 12, B = = 1 2 (1+). Consider,

Let A e2 + 12, B = = 1 2 (1+). Consider, 1. AB=0 thus BA = 0 also. 2. ABBA # 0. 3. AB = BA # 0. Choose the most correct of the following alternatives: (A) only 1 is true. (B) all false. 1 is true in this case but not in general. (D) only 3 is true. (E) only 2 is true.

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