1.

Show that n{P(P(P(phi)))}=4

Answer»

question BASED on power set

Step-by-step explanation:

FIRST of all we see the meaning of power set:it is defined as the number of subsets of the set.

for e.g. if a set A={1,2} then the number of subsets of this set will be 4 i.e. {},{1},{2},{1,2}.

now p{phi} MEANS that number of subsets of a set which contain no element which is EQUAL to 1. therefore p{p{phi}} CONTAINS 2 elements. so p{p{p{phi}}} will contain 4 elements



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