Answer:
1. What is C-B?
Answer: uncountable noun. CB, an abbreviation for 'Citizens' Band', is a range of radio frequencies which the general public is allowed to use to send messages to each other. It is used especially by truck drivers and other drivers who use radio sets in their vehicles. Quick word challenge.
2. What is AnB?
Answer: Intersection The intersection of two sets A and B, written AnB, is the overlap of the two sets. Difference The difference of two sets A and B, written A<B, is what is left of the first set after the elements of the second set are removed. Empty set The empty set, written 0, is the set containing no elements.
Step-by-step explanation:
