| Exam Board | OCR MEI |
|---|---|
| Module | C3 (Core Mathematics 3) |
| Year | 2010 |
| Session | January |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Exponential Functions |
| Type | Solve exponential equation by substitution |
| Difficulty | Easy -1.2 This is a straightforward exponential equation requiring factorisation of e^x as a common factor, then solving e^x = 0 (impossible) or e^x = 5 (giving x = ln 5). It's a standard textbook exercise testing basic manipulation of exponentials with no problem-solving required, making it easier than average. |
| Spec | 1.06g Equations with exponentials: solve a^x = b |
1 Solve the equation $\mathrm { e } ^ { 2 x } - 5 \mathrm { e } ^ { x } = 0$.
\hfill \mbox{\textit{OCR MEI C3 2010 Q1 [4]}}