P1.2.2 - Set + Interval Notation
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11 Terms
What do solid circles on a number line signal?
They are called closed intervals, which include their endpoints
What do hollow circles on a number line signal?
They are called open intervals, which exclude their endpoints.
What is the symbol used for saying a variable is in the set of _?
∈
What is the symbol for the set of real numbers?
‘R’
What does the colon indicate in set notation?
‘such that’
What does a square bracket indicate in set notation?
‘is included’
What does a curved bracket indicate in set notation?
‘not included’
What is the difference between ∪ and ∩
∩ is intersection, ∪ is widely used for ‘or’
In set notation, what type of brackets do we use?
Curvy brackets
In interval notation, when we have infinity do we use a ‘(‘ or ‘[‘
‘(‘
