EXAMPLE 1.2.5
Solution to EXAMPLE 1.2.3 #4
we first need to take into account the shaded region(s) for 
and the shaded region(s) for 
, and then compare them bearing in mind the meaning of union. 
by comparing the shaded region(s) for A with the shaded region(s) for 
and bearing in mind the meaning of intersection. 
Next we must identify the shaded region(s) for 
:
Now we compare the Venn diagram for 
with the Venn diagram for 
(both shown above), and bear in mind the meaning of union.
The shaded region(s) for the set 
will include all of the regions shaded in
along with all of the regions shaded in 
:
