Let N denote the set of naturalno.s and A = `{n^2 : n in N}` and B = `{n^3 : n in N}`.Which one of the following is correct?

Let N denote the set of natural numbers and A = {n^(2) : a in N} andB= {n^(3) : n in N} . Which one of the following is not correct?

Let A = {7n:n in N} and B = {2^(3n)-1: n in N} , then

Let NN be the set of natural numbers and A = {3^n-2n-1:n in NN},B={4(n-1):n in NN} . Prove that A subB .

Let N be the set of integers. A relation R on N is defined as R = {(x, y) | xy gt 0, xy in N} . Then, which one of the following is correct?

Let A = {64n , n in N} and B ={3^(2n+2) - 8^(n) -9, n in N} then

Let A={(n,2n):n epsilon N} and B={(2n,3n):n epsilon N}. What is A nnB equals to ?

Let S_n denote the sum of first n terms of an A.P. and S_2n = 3S_n then ratio of S_3n : S_n