| Exam Board | Edexcel |
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| Module | P1 (Pure Mathematics 1) |
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| Year | 2020 |
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| Session | January |
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| Topic | Product & Quotient Rules |
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9. In this question you must show all stages of your working. Solutions relying on calculator technology are not acceptable.
A curve has equation
$$y = \frac { 4 x ^ { 2 } + 9 } { 2 \sqrt { x } } \quad x > 0$$
Find the \(x\) coordinate of the point on the curve at which \(\frac { \mathrm { d } y } { \mathrm {~d} x } = 0\)