Question

Q) Write the powerset of the following sets
a) {3,7,9}
b) {a, {1,2}
c) {p,q,r,s}

Q) Let n[P(A)] = 512 .
Find the cardinality of A
b) number of proper subsets of A
c) number of subsets of A having exactly two elements​

Answer 1

Answer:

Question 2 -:

The no of subsets of a set having n elements is 2n

Here 2n =512

2 n =2 9

n=9

its the answer.....