If `a in N` such that `a N={a x : x in N}` . Describe the set `3Nnn7Ndot`

If a in N such that aN={ax:x in N} Describe the set 3N nn7N.

If aN = {ax : x in N} , then the set 3 N cap 7 N is

If a N = { ax : x in N} then the set 4N cap 6N is

If aN={ax|x in N}, then: 3Ncap7N=

The set S = { x in N : x + 3=3} is a

If X={4^(n)-3n-1:n in N} and Y={9(n-1):n in N} ,where N is the set of natural numbers,then X uu Y is equal to (1)N(2)Y-X(3)X(4)Y

The number of elements of the set {x: X in N,x^(2) = 1} where N is the set of all natural numbers is :

If A={x:x=3n,n in N} and B={x:x=4n,n in N} , then find A cap B .