| Exam Board | OCR |
|---|
| Module | C4 (Core Mathematics 4) |
|---|
| Year | 2013 |
|---|
| Session | January |
|---|
| Topic | Implicit equations and differentiation |
|---|
3 The equation of a curve is \(x y ^ { 2 } = x ^ { 2 } + 1\). Find \(\frac { \mathrm { d } y } { \mathrm {~d} x }\) in terms of \(x\) and \(y\), and hence find the coordinates of the stationary points on the curve.