Question

If x is an universal set then X-X is equal to_?

Answer 1

Answer:

suppose of x is 1

then 1-1=0

so the set is{ }

Answer 2

If X is an universal set then X-X is equal to null set { }.

• A universal set consists of all elements or objects.
• All sets are a subset of the universal set.
• When the universal set is subtracted from itself a null set is left.

Null set:

1. A null set or an empty set is a set which contains no elements.
2. It is represented as { }.