计算(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)的值了

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 11:55:07
计算(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)的值了
x){nu507zS7r\c ՃXtjyڰɮ6"}_`gC#Rl[] C6ic mQ QI,`_\g lΚf<⦗ w><$Eȷ2

计算(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)的值了
计算(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)的值了

计算(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)的值了
(-1X1/2)+(-1/2X1/3)+(-1/3X1/4)+.+(-1/2009X1/2010)
=-(1-1/2+1/2-1/3+1/3-1/4+.+1/2009-1/2010)
=-(1-1/2010)
=-2009/2010

本题用裂项法,