CAIE IGCSE Mathematics Functions Domain and Range

Practise substituting numbers or expressions into functions and using a stated domain to determine outputs, equations and the corresponding range.

Exam points

replace every x in the function rule with the given number or bracketed expression
evaluate the rule for each member of a finite domain and list the distinct range values
form and solve an equation when a function value or equality between two functions is given

[Maximum number: 2]

$10 \quad \mathrm{f}(x)=4-3 x \quad \mathrm{~g}(x)=x^{2}+x \quad \mathrm{~h}(x)=3^{x}$

Simplify.

f(1-2 x)

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