We use the notation (xn) or (x1, x2, . . .) to denote a sequence whose nth term is xn, and {xn: n ∈ N} to denote the set of all elements of the sequence
We use the notation (xn) or (x1, x2, . . .) to denote a sequence whose nth termis xn, and {xn: n ∈ N} to denote the set of all elements of the sequence