CBSE Class 12 Mathematics 2026 Main Paper 65/2/3 · Q71 Markssymmetric_matrices
CBSE Class 12 Mathematics 2026 Main Paper 65/2/3 · Question 7 (Matrices)
If [[1,a,b],[−1,2,c],[0,5,3]] is symmetric, find 3a+b+c.
✅ Step-by-Step Solution
Final Answer: 2
- Symmetry gives a=−1, b=0, c=5, so 3a+b+c=2.
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