Question

If n (A = 0 ) find n [P(A)]​

Answer 1

(1)A=ϕ

m=0 (number of elements)

n[P(A)]=2

m

n[P(A)]=2

0

n[P(A)]=1

(2)n(A)=3

n[P(A)]=2

3

n[P(A)]=8

(3)n[P(A)]=512

n[P(A)]=2

m

512=2

m

m=9

So, n(A)=9

Answer 2

(1)A=ϕ

m=0    (number of elements)

n[P(A)]=2m

n[P(A)]=20

n[P(A)]=1

(2)n(A)=3

n[P(A)]=23

n[P(A)]=8

(3)n[P(A)]=512

n[P(A)]=2m

512=2m

m=9

So, n(A)=9