<h2>Interval Notation</h2>
<p>It is important to note that this notation can only be used to represent an interval of real numbers.</p>
<h3>Examples:</h3>
<div>
<table>
<tbody>
<tr>
<td>
<p>\((3;11)\)</p>
</td>
<td>
<p>Round brackets indicate that the number is not included. This interval includes all real numbers greater than but not equal to \(\text{3}\) and less than but not equal to \(\text{11}\).</p>
</td>
</tr>
<tr>
<td>
<p>\((-\infty ;-2)\)</p>
</td>
<td>
<p>Round brackets are always used for positive and negative infinity. This interval includes all real numbers less than, but not equal to \(-\text{2}\).</p>
</td>
</tr>
<tr>
<td>
<p>\([1;9)\)</p>
</td>
<td>
<p>A square bracket indicates that the number is included. This interval includes all real numbers greater than or equal to \(\text{1}\) and less than but not equal to \(\text{9}\).</p>
</td>
</tr>
</tbody>
</table>
</div>
<section></section>

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Interval Notation

Mathematics studies measurement, relationships, and properties of quantities and sets, using numbers and symbols. Arithmetic, algebra, geometry, and calculus are popular topics in mathematics.

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\((3;11)\)	Round brackets indicate that the number is not included. This interval includes all real numbers greater than but not equal to \(\text{3}\) and less than but not equal to \(\text{11}\).
\((-\infty ;-2)\)	Round brackets are always used for positive and negative infinity. This interval includes all real numbers less than, but not equal to \(-\text{2}\).
\([1;9)\)	A square bracket indicates that the number is included. This interval includes all real numbers greater than or equal to \(\text{1}\) and less than but not equal to \(\text{9}\).

Interval Notation

Interval Notation

Examples:

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