Discussion
Interval used to indicate interval of all integers between a and b is called
Answer: C
An integer interval holds only the whole numbers lying between its endpoints, rather than every real number there:
\[ \{\, x \in \mathbb{Z} : a \le x \le b \,\} \]
So between 2 and 5 it contains 2, 3, 4 and 5, whereas the closed interval \( [2,5] \) contains every real number in that range. Open and closed describe whether the endpoints are included; this option describes which kind of number is included.
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