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JEE Main 2019 Mathematics question

MathematicsMatricesJEE Main 2019

The total number of matrices , (x, y ∈ R, x ≠ y) for which is:

Answer: (B)

Solution

Columns must be orthogonal with squared length 3: , ⇒ 2 × 2 = 4

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Question ID VK-009813