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Intervals

Types of                                 The      Expression                 Representing on   Notice
intervals                              interval  distinguished               the number line
                                                                                              a ? [??, ??]
                                                   property                                   b ? [??, ??]

The limited intervals  Closed          [a, b] {??: ?? ? ??. ?? = ?? = ??}

                       Open            ]??, ??[ {??: ?? ? ??. ?? < ?? < ??}                   a ? ]??, ??[
                                                                                              b ? ]??, ??[

                       Half open       [??, ??[ {??: ?? ? ??. ?? = ?? < ??}                   a ? [??, ??[
                          Half closed  ]??, ??] {??: ?? ? ??. ?? < ?? = ??}                   b ? [??, ??[

                                                                                              a ? ]??, ??]
                                                                                              b ? ]??, ??]

                                       1ST TERM                              MATH-PREP.2

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