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Let `U=`{1,2,3,...,10}, `A=`{1,3,5,7}, `B=`{1,2,3,4}, and `C=`{3,4,6,7,9}.

Select `A'` from the choices below.


X
MathQuill
   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
log logn ln n  | | e 
sin cos tan arcsin arccos arctan  
[more..]