Paper 1 · Indices and Logs
⏱ Tested in 2 exam questions since 2017
Lesson 8 of 8
Indices and Logs 8: Log Problems
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- Find A and k in a model f(t) = A·e^(kt) from the two scenarios in the wording
- Use the t = 0 starting-point trick: e⁰ = 1, so f(0) = A
- Isolate e^(kt) first, then introduce ln to find k (to 4 decimal places)
- Convert dates to t-values and answer growth/decay questions in context, with units
Most recent exam questions
- 2022 P1 Q9(a)(iii) — deferred
- 2017 P1 Q7(d)
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