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Miscellaneous·2024·Easy

Let A = [3 -3 4 2 -3 4 0 -1 1] What is A(adj A) equal to?

Let
A = [3 -3 4
     2 -3 4
     0 -1 1] What is A(adj A) equal to?

Options

  1. a.
    [5 0 0
         0 5 0
         0 0 5]
  2. b.
    [2 0 0
         0 2 0
         0 0 2]
  3. c.
    [1/2 0 0
         0 1/2 0
         0 0 1/2]
    Correct answer
  4. d.
    [1 0 0
         0 1 0
         0 0 1]

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