Question

Alguem sabe resolver?letras a / b /c

Answer 1

A {-10,-9,... 10}  B{-4,-3...4}  C{1,2,...12}
a) A∪C= {-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12} 
b) (A-B)∩C= {5,6,7,8,9,10} 
c) A-(B-C)= {-10,-9,-8,-7,-6,-5,0,1,2,3,4,5,6,7,8,9,10} 
Acho que é isso