按答案的结构不同,我们可以把数学开放题分成四类:(一)有限穷举型;(二)有限混沌型;(三)无限离散型;(四)无限连续型.下面以“单位分数”问题为例,谈谈“有限混沌型”开放题的探究.从21,31,41,…,510共49个单位分数中,找出七个分数,要求它们的和为1.如果从49个单位分数中,漫无目 According to the different structure of the answer, we can divide the open question of mathematics into four categories: (a) limited and exhaustive type; (b) finite chaos type; (c) infinite discrete type; (d) infinite continuous type. “, For example, to explore the open-ended question of” finite chaos type. "Of the 49 unit scores 21, 31, 41, ..., 510, seven scores are found, requiring that their sum be 1. If from 49 A unit score, Man Manmu