The number of elements in the set `S={i^(n)+i^(-n)*n in z}` is

If n(A) denotes the number of elements in set A and if n(A) = 4, n(B) = 5 and n(A nn B) =3 then n[(A xx B) nn (B xx A)]=

The number of elements of the power set of a set containing n elements is

If A={p:p=((n+2)(2n^(5)+3n^(4)+4n^(3)+5n^(2)+6))/(n^(2)+2n), n p in Z^(+)} then the number of elements in the set A, is

If A={n:(n^(3)+5n^(2)+2)/(n)"is an integer"}, then the number of elements in the set A, is

If {p in N: "p is a prime" and p=(7n^(2)+3n+3)/(n)"for some n" in N}' then the number of elements in the set A, is

Consider the following statements : 1. Nuu(BnnZ)=(NuuB)nnZ for any subset B of R , where N is the set of positive integers, Z is the set of integers, R is the set of real numbers. 2. Let A={n in N : 1 ge n ge 24, n "is a multiple of" 3} . There exists no subsets B of N such that the number of elements in A is equal to the number of elements in B . Which of the above statemetns is/are correct ? (A) 1 only (B) 2 only (C) Both 1 and 2 (D) Neither 1 nor 2

If i=sqrt(-1), the number of values of i^(-n) for a different n inI is

The value of i^n + i^-n

The number of subsets of a set containing n elements is :

The number of subsets of a set containing n elements is