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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

Let , , , and , and . Then is

Answer: (A)

Solution

The three conditions give

Missing argument for \vec\vec a·Missing argument for \vec\vec b + Missing argument for \vec\vec a·Missing argument for \vec\vec c = 0, Missing argument for \vec\vec b·Missing argument for \vec\vec c + Missing argument for \vec\vec b·Missing argument for \vec\vec a = 0, Missing argument for \vec\vec c·Missing argument for \vec\vec a + Missing argument for \vec\vec c·Missing argument for \vec\vec b = 0.

Adding: . Hence

|Missing argument for \vec\vec a + Missing argument for \vec\vec b + Missing argument for \vec\vec c|^

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Question ID VK-109623