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  1. Mar 2022
  2. math.libretexts.org math.libretexts.org
    3.2.1: Exercises 3.2
    1
    1. JordanAshley 18 Mar 2022
      3

      If the answer key is to be believed, this should be -3.

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    math.libretexts.org/Bookshelves/Linear_Algebra/Fundamentals_of_Matrix_Algebra_(Hartman)/03:_Operations_on_Matrices/3.02:_The_Matrix_Trace/3.2.1:_Exercises_3.2
  3. Feb 2022
  4. math.libretexts.org math.libretexts.org
    2.3.1: Exercises 2.3
    1
    1. JordanAshley 25 Feb 2022
      Figure 2.3.1.3

      This image is identical to Figure 2.3.1.2 from the above exercise.

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    math.libretexts.org/Bookshelves/Linear_Algebra/Fundamentals_of_Matrix_Algebra_(Hartman)/02:_Matrix_Arithmetic/2.03:_Visualizing_Matrix_Arithmetic_in_2D/2.3.01:_Exercises_2.3