Mathematics for IGCSE & O level - Sets (Section 3 - No. 8)
Which of these is an example of a set defined by a rule?
{1, 2, 3, 4}
The set of all students in a class
{x | x is an even number}
The set of all prime numbers less than 10
Explanation
{x | x is an even number} defines a rule to find all of the even numbers.
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