The answer to exercise marked [BB]can be found in the Back of the Book.
[BB] Suppose m and n are relatively prime positive integers. Show that there exist integers s and t with s > 0 such that sm + tn = 1. [Hint: It might be helpful first to consider some specific examples. For instance, can you find s and t, s > 0, such that 7s + 22t = 1?]
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