what is interval notation

Interval notation-is a way of writing subsets of the real number line . A closed interval is one that includes its endpoints: for example, the set {x | −3≤x≤1} . To write this interval in interval notation, we use closed brackets [ ]: [−3,1]

Example/s of INTERVAL NOTATION

-We can use interval notation to show that a value falls between two endpoints. For example, -3≤x≤2, [-3,2], and {x∈ℝ|-3≤x≤2} all mean that x is between -3 and 2 and could be either endpoint.

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Answer:

Interval Notation

Interval notation is a way of writing subsets of the real number line .

A closed interval is one that includes its endpoints: for example, the set {x | −3≤x≤1} .

To write this interval in interval notation, we use closed brackets [ ]:

[−3,1]

An open interval is one that does not include its endpoints, for example, {x | −3<x<1} .

To write this interval in interval notation, use parentheses :

(−3,1)

You can also have intervals which are half-open and half-closed:

[−2,4)

You can also use interval notation together with the set union operator to write subsets of the number line made up of more than one interval:

[−4,−2]∪(−1,1)∪(1,2]∪{4}

Step-by-step explanation:

Sagot :

Interval Notation

Interval notation is a way of writing subsets of the real number line .

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