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Spot the odd one out

Exercise and reference answers

Questions
  1. Items
    1. Row matrix
    2. Determinant
    3. Column matrix
    Odd item
    Determinant
  2. Items
    1. Diagonal
    2. Scalar
    3. Rectangular
    4. Identity
    Odd item
    Rectangular
  3. Items
    1. AB = BA
    2. A + B = B + A
    3. k(A + B) = kA + kB
    Odd item
    AB = BA

Explanation

Each group is one summary bullet. Source: syllabus Maths Part I, Ch 3 Matrices.
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