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Determinants: 2 marks Questions (CBSE Class 12)

2 different 2 marks questions on Determinants from CBSE Class 12 Maths board exams 2024–2026, newest first.

1 mark (35)2 marks (2)3 marks (1)4 marks (3)5 marks (24)
Q212 marksVery Short AnswerDeterminantsCBSE 2025 · 65/4/1

Let A and B be two square matrices of order 3 such that det (A) = 3 and det (B) = – 4. Find the value of det (– 6AB).

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Answer: 2592
  1. For order 3, .
  2. .
  3. .
Q212 marksVery Short AnswerDeterminantsCBSE 2025 · 65/4/2

Using matrices and determinants, find the value(s) of k for which the pair of equations ; has a unique solution.

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Answer: All real k except , i.e.
  1. In matrix form AX = B with .
  2. Unique solution exists iff : .
  3. .
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