Question 1016956
"B \ A is defined to be the set of all objects that are in A but not in B."

It is defined the other way around, i.e. B\A is the set of elements in B but not A.


When A = {1}, B = {1,2}, and C = {1,2,3}, then


B \ A = {2} --> C \ (B \ A) = {1,3}
C \ B = {3} --> (C \ B) \ A = {3}