Mathematics for IGCSE & O level - Sets (Section 3 - No. 43)
Which of the following statements is/are true about subsets?
The empty set is a subset of every set.
Every set is a subset of itself.
A set with 'n' elements has 2^n subsets.
A set is not a subset of itself.
解释
The empty set is a subset of every set. A set with 'n' elements has 2^n subsets. A set is a subset of itself.