Question

A= {1, 4, 9, 16, 25, 36, 49, 64, 81, 100} write the sets using rule method

Answer 1

We notice that they are squares of :
1 = 1^2
4 = 2^2
9 = 3^2
16 = 4^2
25 = 5^2
upto 100 = 10^2

So A = { x : x = n^2 , n E N and n<11 }