Class 12 Determinants · Mcq Single Correct1 Markssingularity_and_invertibility
Class 12 Maths · Determinants · Mcq Single Correct #8
For which real k is A=\(\begin{bmatrix}k & 8\\4 & 2k\end{bmatrix}\) singular?
✅ Step-by-Step Solution
Final Answer: Option (C): ±4
- Singularity requires det(A)=2k²−32=0, so k=±4.
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