Mathematics for IGCSE & O level - Sets (Section 1 - No. 35)
In set theory, what does the notation P - Q (or P\Q) represent?
The intersection of P and Q
The set of all elements in P that are not in Q
The complement of the union of P and Q.
The set of all elements in Q that are not in P
Paliwanag
P - Q represents all elements in P which aren't present in Q.