Question: For xn given by the following formulas, establish either the convergence or the divergence of the sequence X = (xn). (a) xn := n/n +

For xn given by the following formulas, establish either the convergence or the divergence of the sequence X = (xn).
(a) xn := n/n + 1;
(b) xn := (-1)nn/n + 1;
(c) xn := n2/n + 1;
(d) xn := 2n2 + 3/n2 + 1.

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