| Exam Board | OCR MEI |
|---|
| Module | Paper 2 (Paper 2) |
|---|
| Year | 2023 |
|---|
| Session | June |
|---|
| Topic | Implicit equations and differentiation |
|---|
15 In this question you must show detailed reasoning.
The equation of a curve is
$$\ln y + x ^ { 3 } y = 8$$
Find the equation of the normal to the curve at the point where \(y = 1\), giving your answer in the form \(\mathrm { ax } + \mathrm { by } + \mathrm { c } = 0\), where \(a , b\) and \(c\) are constants to be found.