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本文以常德一道中考填空题为例,介绍了富有趣味性的一道分式题型,从多角度推导,并将该题作进一步拓展.题目:已知2-1/22-12=1/(2+1)=1/3;(4-3+2-1)/(42-32+22-12)=2/(4+3+2+1)=1/5;计算:(6-5+4-3+2-1)/(62-52+42-32+22-12)=____
This article takes Changde as an example, introduces a fun-filled fractional question type, derives it from multiple perspectives and further expands it. Title: Known 2-1 / 22-12 = 1 / ( 2 + 1 = 1/3; (4-3 + 2-1) / (42-32 + 22-12) = 2 / (4 + 3 + 2 + 1) = 1/5; 5 + 4-3 + 2-1) / (62-52 + 42-32 + 22-12) = ____