1 1 1 2007_ ++...+__

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/18 15:24:59

1 1 1 2007
_______________ +______________+...+________________=___________
(X+1) (x+2) (x+2) (x+3) (x+2007)(x+2008) 3x+6024

1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+2007)(x+2008)=2007/(3x+6024)
1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+...+1/(x+2007)-1/(x+2008)=2007/(3x+6024)
1/(x+1)-1/(x+2008)=2007/(3x+6024)
2007/(x+1)(x+2008)=2007/(3x+6024)
x^2+2009x+2008=3x+6024
x^2+2006x-4016=0
(x+2008)(x-2)=0
x1=-2006
x2=2

1 1 1 2007_______________ +______________+...+______________ 一、英语翻译（每个一分,1、互相聊天_______________ 2、喊我起床______________ 1）翻译：赛跑明星______________ 几首诗填空1、故园东望路漫漫,______________.______________,凭君传语报平安.（岑参《逢入京 1、眼睛是心灵的窗户.(仿写)眼睛是______________.______________是____________ 问问:照样子写词语1.连估带猜(第1,3字打点)______________ ______________ ______ 有关书1、书是______________,让人____________；书是______________,让人____ 1.______________,奶奶激动得_______________. 仿写沙白的秋秋湖波上,_______________ 如______________,_______________ _______________、_______________、______________是实践“三个代表”的根本要求英语填空：1、She ______________ passing the English examination to 1、which latter is like a pyramid（金字塔）______________