If set A={1} How many elements of P[P{P(A)}] contains - Maths - Sets

Question

If set A={1} How many elements of P[P{P(A)}] contains?

Anuradha Sharma · Accepted Answer

If A= 1Then number of elements in PA= 21=2 So Number of element in PPA=22= 4 and  Number of element in PPPA=24= 16

If set A={1}.How many elements of P[P{P(A)}] contains?