For any positive integer n, the sum of the first n positive integers equals to [n(n+1)]/2. what is the sum of all even integers between 99-301? 请教此题的解题思路。谢谢。
sum of 1 to 98
sum of 1 to 301
then deduct
以下是引用sammen在2004-12-29 22:15:00的发言:sum of 1 to 98
sum of 1 to 301
then deduct
以下是引用sammen在2004-12-30 21:26:00的发言: 其实你也可以想到得,欢迎你来问问题,大家一起提高。
但惭愧的是,我确实想不到啊
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