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Class 12

Matrices and Matrix Operations — Quiz

Five questions on matrices and matrix operations. Pick one answer for each.

5 questions, one mark each. 3 to pass. Suggested time: 10 minutes. Your answers are not recorded.

  1. If AA is of order 2×32 \times 3 and BB is of order 3×43 \times 4, the order of ABAB is
  2. The 2×22 \times 2 matrix with aij=i+2ja_{ij} = i + 2j is
  3. Find ABAB for A=[2103]A = \begin{bmatrix} 2 & 1 \\ 0 & 3 \end{bmatrix} and B=[1−142]B = \begin{bmatrix} 1 & -1 \\ 4 & 2 \end{bmatrix}.
  4. If A=[13−20]A = \begin{bmatrix} 1 & 3 \\ -2 & 0 \end{bmatrix} and B=[411−3]B = \begin{bmatrix} 4 & 1 \\ 1 & -3 \end{bmatrix}, find 2A−B2A - B.
  5. For matrices AA and BB for which ABAB is defined, (AB)T(AB)^T equals
Unanswered questions are marked wrong.

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