Determinants · Class 12 · CBSE · Science Mathematics
If |a b; c d| = 7, then what is the value of |c d; a b|?
Practice question from Determinants (Class 12 · CBSE · Science Mathematics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-0BACEB
If |a b; c d| = 7, then what is the value of |c d; a b|?
- A.7
- B.−7Correct answer
- C.0
- D.49
Solution
The second determinant is obtained by interchanging the two rows of the first determinant. Interchanging two rows changes the sign of a determinant, so its value is −7.
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