| Exam Board | CAIE |
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| Module | P1 (Pure Mathematics 1) |
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| Year | 2022 |
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| Session | November |
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| Topic | Chain Rule |
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3 A curve has equation \(y = a x ^ { \frac { 1 } { 2 } } - 2 x\), where \(x > 0\) and \(a\) is a constant. The curve has a stationary point at the point \(P\), which has \(x\)-coordinate 9 .
Find the \(y\)-coordinate of \(P\).