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Find the set of all z such that neither 2+z nor 2-z is in the interval (-1, 1]. Express your answer as an interval or as a union of intervals.

 Jul 23, 2022
 #1
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Nevermind, I solved it.

 Jul 23, 2022
 #2
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By the way, the answer is (-inf,-1) U (1,3) U (3,inf).

 Jul 24, 2022

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