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3.2 Algebra and Functions (A-level only)

3.2 Algebra and Functions (A-level only)

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Question 133

The functions f f\,f and g g\,g are defined by

f(x)=x2−4x−5f(x) = x^2 - 4x - 5f(x)=x2−4x−5 for x>2x > 2x>2

g(x)=2x+1g(x) = 2x + 1g(x)=2x+1 for x∈Rx \in \mathbb{R}x∈R

a.

Find an expression for gf(x)gf(x)gf(x) and, using set notation, state its domain.

[3]
b.

Using set notation, state the range of gfgfgf.

[2]
Markscheme

3.2 Algebra and Functions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.2 Algebra and Functions (A-level only)

216 exam-style questions on WJEC A Level Maths 3.2 Algebra and Functions (A-level only), covering 3.2.1 Algebra and Functions (A-level only), 3.2.2 Algebra and Functions (A-level only), 3.2.3 Algebra and Functions (A-level only), 3.2.4 Algebra and Functions (A-level only), 3.2.5 Algebra and Functions (A-level only), 3.2.6 Algebra and Functions (A-level only), and 3.2 Algebra and Functions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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