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Miscellaneous·2019·Easy

If A = [[1, 2], [2, 3]] and B = [[1, 2], [3, 4]] , then which one of the following is correct?

If A = [[1, 2], [2, 3]] and B = [[1, 2], [3, 4]], then which one of the following is correct?

Options

  1. a.

    Both AB and BA exist

  2. b.

    Neither AB nor BA exists

  3. c.

    AB exists but BA does not exist

    Correct answer
  4. d.

    AB does not exist but BA exists

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