Edexcel IGCSE Math A 3.2.HC domain and range

Practise domain-and-range questions by spotting denominator restrictions, excluded x-values and the output values allowed by the function.

Exam points

State the x-value that must be excluded when a denominator would become zero.
Write the range of a function after applying its domain or transformation restriction.

[Maximum number: 1]

f is the function such that f(x)=4-3 x

Find the value of x that cannot be included in any domain of g

For $g(x)=\frac{1}{1-2x}$ , the denominator cannot be zero:
$1-2x\ne0$

Final answer:
$x\ne0.5$

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