Null set(∅) is a subset of every set - prove it.
Empty /Null Set is called the subset of every set,it can be proved clearly with an example.
• Let,A is a set: A={a,b,c,d}
∅={} Null set
Now, if Null Set (∅) is not the sub-set of Set-A; then there must be an element in ∅ which does not belong to set-A But,it is true that there is not a single element in ∅. That is why ∅ is the subset of A-set.
Because,a set would not be the subset of an other set in this condition, there must be a different element in that Set.
In this way for all sets it can be proved that Null set (∅) is a subset of every set.
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