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1.6.4 Differentiation

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For y=f(x)y=f(x)y=f(x), the first derivative f′(x)f'(x)f′(x) gives the [     ] of the curve at each xxx.

A
  • For x3x^3x3, f′′(x)=6xf''(x)=6xf′′(x)=6x changes sign.
  • For x4x^4x4, f′′(x)=12x2f''(x)=12x^2f′′(x)=12x2 does not.
B

For y=f(x)y=f(x)y=f(x), the first derivative f′(x)f'(x)f′(x) gives the gradient of the curve at each xxx.

C

For a small change Δx\Delta xΔx, the change in gradient is approximately Δ(dydx)≈f′′(x)Δx\boxed{\Delta\left(\dfrac{dy}{dx}\right)\approx f''(x)\Delta x}Δ(dxdy​)≈f′′(x)Δx​.

D

Differentiate f′(x)f'(x)f′(x) with respect to xxx.

Card 1 of 20

1.6.4 Differentiation Flashcards

  1. A Level
  2. /Maths
  3. /1.6.4 Differentiation

20 flashcards on CCEA A Level Maths 1.6.4 Differentiation: the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.

Flashcards