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Functions and Graphs

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Question 121

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

f:x→ex,x∈R f : x \rightarrow e^x, \quad x \in \mathbb{R} f:x→ex,x∈R gf:x→2ex+x,x∈R gf : x \rightarrow 2e^x + x, \quad x \in \mathbb{R} gf:x→2ex+x,x∈R
a.

Write down the range of fff

[1]
b.

Find an expression for ggg

[2]
c.

Write down the range of gfgfgf

[1]
Markscheme

Functions and Graphs Questions

  1. A Level
  2. /Maths
  3. /Functions and Graphs

471 exam-style questions on Edexcel A Level Maths Functions and Graphs, covering 2.1 The Modulus Function, 2.2 Functions and Mappings, 2.3 Composite Functions, 2.4 Inverse Functions, 2.5 y=|f(x)| and y=f(|x|), 2.6 Combining Transformations, and 2.7 Solving Modulus Problems. Each one has a worked solution and a mark scheme showing where the marks go.

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