Question

21. Find the number of subsets of A if A = (x:x= 4n+ 1,2<n<5, n E N}​

Answer 1

Explanation:

ANSWER

A={X:x=4n+12≤n≤5}

⇒A={4(2)+1,4(3)+1,4(4)+1,4(5)+1}

⇒2{9,13,17,21}

no of subsets of A=2

4

=16