“等差数列前n项求和”教学的迁移式设计

The Transference Form Designs for the Summary of the First "n" Items in the Arithmetic Progression

根据图形到数式、特殊到一般倒序相加法的特点,实现了图形与数式、数式与数式的迁移,并从发散到收敛、直观到严谨探索等差数列前n项和方法.

From graphics to formula, specialty to common, with the thinking characteristics of summarization methods in reversed order, we can realize the transference from graphics and formula, from formula to formula. From volatilization to convergence, visual to preciseness, we have the methods of the summary of the first ＂n＂ items in the arithmetic progression.