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我们在解决数学问题时,一种非常重要的数学思想是“特殊与一般思想”.一说到这儿,同学们立马想到解选择题、填空题,或数学大题探讨未知结论时所用的“由特殊到一般”的思想方法.事实上,“由一般到特殊”也非常重要,这就牵扯到“整体把握”的问题,一些解决问题的思路,就来自于对问题的整体把握,下面举例说明.题目(2017年高考北京卷理20)设{a_n}和{b_n}是两个等差数列,记
One of the most important mathematical ideas that we have in solving mathematical problems is “special and general thinking.” When it comes to this, students immediately come to mind when solving multiple choice questions, filling in blank questions, or math problems in exploring unknown conclusions In fact, “from general to special ” is also very important, which involves the “overall grasp ”, some ideas to solve the problem, from the The overall grasp of the problem, the following examples. Subject (2017 college entrance examination in Beijing Volume 20) set {a_n} and {b_n} are two arithmetic sequence, remember