Answer
$T'=\{ ...,-2,-1,0\}$
Work Step by Step
We have $U=\{ ...,-1,0,1,2,..12 \}$
and $T=\{ 1,2,3,...12 \}$
The complement of set T is the set of all elements in the universal set that are not in the set.
So $T'=\{ ...,-2,-1,0\}$
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