Paper 1 · Differentiation
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Lesson 9 of 21
Differentiation 9 – Logs
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- Differentiate ln(x) and ln(g(x)) using d/dx[ln g(x)] = g'(x)/g(x)
- Simplify ln of fractions and roots with the rules of logs BEFORE differentiating
- Derive results like d/dx[ln(cos x)] = −tan x via the chain rule
- Spot that ln(3x) differentiates to 1/x — the constant cancels
Most recent exam questions
- 2025 P1 Q9(a)(iv)
- 2024 P1 Q5(b)(ii) — deferred
- 2022 P1 Q10(c)(i)
- 2020 P1 Q6(b)(i)
- 2019 P1 Q3(c)
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