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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

is equal to

Answer: (A)

Solution

(|Missing argument for \vec\vec a|^2 + |Missing argument for \vec\vec b|^2 + 2Missing argument for \vec\vec a·Missing argument for \vec\vec b) - (|Missing argument for \vec\vec a|^2 + |Missing argument for \vec\vec b|^2 - 2Missing argument for \vec\vec

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Question ID VK-109628