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Use Interval Notation to define each interval:

All real numbers at least 5 units from 8.

3 answers

well x can not be in the part of our number line from 3 to 13 but 3 and 13 are ok

3 >/= x >/=13

(-oo,3] U [8,+oo)

(-oo,3] U [13,+oo)

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