Question

1) For A={a,b,{a,c},ϕ} determine the following set.

A-{{a,b}}

A-ϕ

{a,c}-A

{ϕ}-A

{a}-A



​

Answer 1

Answer:

We know that if A is a set with m elements i.e., n(A)=m,

then, n[P(A)]=2

m

.

If A=ϕ, then n(A)=0

∴n[P(A)]=2

o

=1

Hence, P(A) has one element.