| Exam Board | Edexcel |
|---|
| Module | C4 (Core Mathematics 4) |
|---|
| Year | 2005 |
|---|
| Session | June |
|---|
| Topic | Implicit equations and differentiation |
|---|
2. A curve has equation
$$x ^ { 2 } + 2 x y - 3 y ^ { 2 } + 16 = 0 .$$
Find the coordinates of the points on the curve where \(\frac { \mathrm { d } y } { \mathrm {~d} x } = 0\).