

InterviewSolution
Saved Bookmarks
1. |
For any set A, prove that A⊆ϕ ⇔ A =ϕ |
Answer» Let A ⊆ ϕ A is a subset of the null set , then A is also an empty set. ⇒ A =ϕ Now, let A =ϕ ⇒ A is an empty set. Since, every set is a subset of itself. ⇒ A ⊆ ϕ Hence, for any set A, A⊆ϕ ⇔ A =ϕ |
|