Question

How many elements has P(A), if A = Φ?

Answer 1

If A=Ф that menas A does not contain any element i.e., n=0.
Now, number of elements in a power set is 2ⁿ.
∴, n[P(A)]=2⁰=1
Therefore P(A) contains 1 element.

Answer 2

Answer:

This power set will contain 1 element.

Because fi means 0.

So, n=0

So, no. of elements 2raised to the power n

2 raised to d power 0 which is equal to 1.