Good evening ,
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Answer:
C. None of these.
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Step-by-step explanation:
{x | x < 0}
-A all positive integers (false because x is negative)
-B all positive real numbers numbers (false because x is negative)
-C None of these (true)
-D all negative real numbers (false because 0 must be in the set)
-E all negative integers (false because 0 must be in the set)
In other words, 0∈E and 0 ∉ {x | x < 0}.
:)
