Question

Prove:IF A is a Subset of B then A intersection B' =empty set

Answer 1

Well from what i can see from the statement so far :
LHS
if x is an element in A then x is an element in B
RHS
x is and element of A and x is an element of B'
RTS Since:
x is an element of B and x ian element of B'
this gives us a contradiction
x can't be in B but not in B at the same time right???

Answer 2

Please post this in the mathematics section.
You are in the computer science section.
Thanks.