# Convergent Sequence of Rationals

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Show that, for every real number y, there is a sequence of rational numbers which converges to y.

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##### Solution Summary

A detailed proof of the following statement is given: For every real number y, there is a sequence of rational numbers which converges to y.

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There are two cases to consider:

Case i. y is rational

For every n >= 1, let a_n = y - (1/n). Then a_n is rational for every n >= 1, since (a) both y and 1/n are rational and (b) the difference of two rational numbers is rational. Clearly, the sequence {a_n} converges to y.

Example: y = 3.

The sequence of rational ...

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- PhD, The Catholic University of America
- PhD, The University of Maryland at College Park

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