| Exam Board | OCR MEI |
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| Module | C4 (Core Mathematics 4) |
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| Year | 2007 |
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| Session | June |
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| Topic | Vectors: Lines & Planes |
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2 Write down normal vectors to the planes \(2 x + 3 y + 4 z = 10\) and \(x - 2 y + z = 5\).
Hence show that these planes are perpendicular to each other.