| Exam Board | Edexcel |
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| Module | C3 (Core Mathematics 3) |
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| Year | 2016 |
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| Session | June |
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| Topic | Product & Quotient Rules |
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2.
- Find \(\frac { \mathrm { d } y } { \mathrm {~d} x }\), writing your answer as a single fraction in its simplest form.
- Hence find the set of values of \(x\) for which \(\frac { \mathrm { d } y } { \mathrm {~d} x } < 0\)
2.
$$y = \frac { 4 x } { x ^ { 2 } + 5 }$$