Paper 1 · Differentiation
⏱ Tested in 5 exam questions since 2016
Lesson 14 of 21
Differentiation 14 – Slopes
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- Find the slope of a curve at a point by evaluating the first derivative there
- Build the tangent's equation with the page-18 formula y − y₁ = m(x − x₁)
- Work backwards from a given slope: solve dy/dx = m for x, then find the point
- Sub x into the ORIGINAL curve (not the derivative) to get the y-coordinate
Most recent exam questions
- 2025 P1 Q2(a)(ii)
- 2025 P1 Q2(b)(i)
- 2024 P1 Q3(b)(i)
- 2023 P1 Q9(c)(i)
- 2021 P1 Q5(b)
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