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Functions and Graphs

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Question 127

The functions f f\,f and g g\,g are defined for all real values of x x\,x by

f(x)=3x2−4x and g(x)=5x+2 f(x) = 3x^2 - 4x \text{ and } g(x) = 5x + 2 f(x)=3x2−4x and g(x)=5x+2

Give a reason why f f\,f has no inverse.

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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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