Question

Q. 6 the number of elements
of P (A) if A = { 1,2,5} *​

Answer 1

Answer:

{1}

Then num of element in

P(A)=

2 1

2

num of element in

P{P(A)}=

2 2

4

num of element in

P(P(P(A)))=

2 4

16

Answer 2

Answer:

Step-by-step explanation

A=(1,2,5)

Hence, n(A) = 3, here n refers the number and n(A) means the numbers of set A. There is a formula of P(A) that is 2^n(A). P refers the power set. And the power set of any set A is the set of all subsets of A. P(A)= 2³ => 8 that means the total number of elements. So the total number of elements are

P(A)= {∅,(1),(2),(5),(1,2),(1,5)(2,5),(1,2,5)}