用整体思想巧解数列问题杨旭东（甘肃省徽县一中７４２３００）数列问题，由于未知数较多，常使解题过程繁杂，有时还难以求得结果．若运用整体思想，从问题的全局出发，抓住问题的本质，进行整体运算、整体求解，则能使问题获得快速、准确的解决．例１等差数列｛ａｎ｝中... Using the whole idea to solve the series problem Yang Xudong (Huixian No. 742300, Gansu Province) series problem, because of the large number of unknowns, it often makes the problem-solving process complicated and sometimes difficult to obtain the result. If we apply the whole idea, grasp the essence of the problem from the perspective of the problem, perform overall calculations, and solve the problem as a whole, the problem can be solved quickly and accurately. Example 1 The arithmetic series {an}...