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Class 12 Determinants · Assertion Reason1 Marksassertion_reason

Class 12 Maths · Determinants · Assertion Reason #24

Assertion: If \(\begin{vmatrix}x & 2\\18 & x\end{vmatrix}\)=\(\begin{vmatrix}6 & 2\\18 & 6\end{vmatrix}\), then x=±6. Reason: A real skew-symmetric matrix of odd order has determinant zero.

✅ Step-by-Step Solution

Final Answer: Option (B): Both A and R are true, but R does not correctly explain A.
  1. The equality gives x²−36=36−36=0 and hence x=±6. The reason is true but unrelated to this computation.

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