| Exam Board | Edexcel |
|---|
| Module | Paper 1 (Paper 1) |
|---|
| Session | Specimen |
|---|
| Topic | Laws of Logarithms |
|---|
4. Given that \(a\) is a positive constant and
$$\int _ { a } ^ { 2 a } \frac { t + 1 } { t } \mathrm {~d} t = \ln 7$$
show that \(a = \ln k\), where \(k\) is a constant to be found.