Card 1 of 21
Are {1,2,3}\{1,2,3\}{1,2,3} and {3,2,1,1}\{3,2,1,1\}{3,2,1,1} equal sets?
A
Yes - order and repeated elements do not change a set.
B
Sets AAA and BBB are disjoint when A∩B=∅\boxed{A\cap B=\varnothing}A∩B=∅.
C
22+18−7=3322+18-7=3322+18−7=33.
D
(4,∞)(4,\infty)(4,∞).
Card 1 of 21
1.1.3 Set theory language and symbols Flashcards
21 flashcards on AQA A Level Maths 1.1.3 Set theory language and symbols: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.