But, if we're going to start to include more set theory, why not teach the symbol [math].
Get Interval Notation All Real Numbers PNG. In mathematics, a (real) interval is a set of real numbers that contains all real numbers lying between any two numbers of the set. We often use infinity in interval notation.
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For example, we can express the set, {x | x ≠ 0}, using interval notation as The endpoint values are listed between brackets or parentheses. The second lesson, the infinite world of real numbers, explains notation we use to discuss.
In this section you will:
[ means the notations below all represent the same solution, assuming x is a real number: A way of writing the set of all real numbers between two endpoints. For example, [3, 8) is the interval of real numbers between 3 and 8, including 3 and excluding 8. Far too little set theory is included in the curriculum, and the addition of notation to denote sets constitutes a small step to improve this.
