Class 12 Determinants · Conceptual Answer1 Marksdeterminant_properties
Class 12 Maths · Determinants · Conceptual Answer #42
For 3×3 matrices A,B, det(A)=2 and AB=2I. Find det(B).
✅ Step-by-Step Solution
Final Answer: 4
- Take determinants: det(A)det(B)=det(2I₃)=2³=8. Dividing by 2 gives det(B)=4.
- 4
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] Take determinants: det(A)det(B)=det(2I₃)=2³=8. Dividing by 2 gives det(B)=4.
- [0.5 marks] 4
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