Paper 1 · Differentiation
Lesson 12 of 21
Differentiation 12 – Substitution
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- Differentiate composites with the Leibniz chain rule dy/dx = dy/du · du/dx
- Choose u as the inner expression and rewrite y in terms of u
- Compute dy/du and du/dx separately, multiply, then substitute u back
- Apply substitution to powers, trig, exponential and ln functions
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