1/1X2+1/2X3+1/3X4+...+1/99X100 怎么简便计算.过程..

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/11/08 07:58:31

1/1X2+1/2X3+1/3X4+...+1/99X100 怎么简便计算.过程..
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1/1X2+1/2X3+1/3X4+...+1/99X100
=（1-1/2）+(1/2-1/3)+(1/3-1/4)+...+(1/99-1/100)
=1-1/100
=99/100

计算1x2+2x3+3x4+4x5+...+99x100 简便计算1/2+1/2x3+1/3x4+1/4x5+...+1/99x100 1/(1x2)+1/(2x3)+1/(3x4)+．．．．．．+1/(99x100)=?要计算过程． 1分之1x2+1分之2x3+1分之3x4.+1分之99x100 1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101 1/1x2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100 1/1X2+1/2x3+1/3x4+1/4x5+.+1/98x99+1/99x100求结果! 一定要帮我啊!(1/1x2)+(1/2x3)+(1/3x4)+(1/4x5)+.+(1/99x100)=? 2/1x2+2/2x3+2/3x4+2/4x5+...+2/98x99+2/99x100 求1x2,2x3,3x4,4x5,……98x99,99x100的倒数和 1X2+2X4+3X6+.50X100 一道简便计算数学题1X2+2X3+3X4+4X5...+n(n+1)一1X2+2X3+3X4+4X5...+2013X2