| Exam Board | OCR |
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| Module | C4 (Core Mathematics 4) |
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| Year | 2007 |
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| Session | January |
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| Topic | Implicit equations and differentiation |
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7 The equation of a curve is \(2 x ^ { 2 } + x y + y ^ { 2 } = 14\). Show that there are two stationary points on the curve and find their coordinates.