If xn = squ(n), show that (xn) satisfies lim |xn+1 - xn| = 0, but that it is not a cauchy sequenc.
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Originally Posted by frenchguy87 If xn = squ(n), show that (xn) satisfies lim |xn+1 - xn| = 0, but that it is not a cauchy sequenc. The first part is trivial. For the second part note that $\displaystyle x_{4n}-x_n=\sqrt{n}$
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