JEE Advanced 2023 Mathematics question

MathematicsVector AlgebraJEE Advanced 2023

Let be the plane and let . Let , and be three distinct vectors in such that . Let be the volume of the parallelepiped determined by vectors , and . Then the value of is .

Answer: 45

Solution

The normal has length 4. Distance gives (30 is impossible for a unit vector), i.e. . So S is a circle on the unit sphere at height along , with radius

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Question ID VK-034073