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标题: 请教一道ds, og 190.谢谢! [打印本页]

作者: kuuiytt    时间: 2005-3-5 07:43     标题: 请教一道ds, og 190.谢谢!

190. An infinite sequence of positive integers is called an “alpha sequence” if the number of even integers in the sequence is finite. If S is an infinite sequence of positive integers, is S an alpha sequence?

(1) The first ten integers in S are even.

(2) An infinite number of integers in S are odd.


作者: lololo    时间: 2005-3-5 07:47

up!




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