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本文通过四道数列题的解题过程分析简介,目的是使学生在较为全面地了解数列通项n a公式的相关数列求法中最终理解解题“六步法”(设―找―列―解―检验―答)中找的原理――根据题目的特点,选择“+、-,×、÷(取倒数),乘方、开方,取对数”等不同的运算以及“同构”已知量与未知量,找到已知条件与未知结论的逻辑关系,实现有法解题。
This article through the four series of questions to solve the process of analysis of brief introduction, the purpose is to enable students to more fully understand the sequence of na na series formula for the final understanding of the problem-solving “six-step method” (set - to find - column - Solution - test - answer) to find the principle - according to the characteristics of the topic, select “+, -, ×, ÷ (take the reciprocal), the power, the square, take the logarithm ” and other different operations and Isomorphic "Known amount and unknowns, to find the logical relationship between known conditions and the unknown conclusion, to achieve a legal solution to the problem.