1/1x3+1/3x5+1/5x7+...+1/97x99=?

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/19 15:54:49

1/1x3+1/3x5+1/5x7+...+1/97x99
=1/2(1-1/3+1/3-1/5+1/5-1/7+...+1/97-1/99)
=1/2(1-1/99)
=49/99

2/1x3 + 2/3x5 + 2/5x7 +······+ 2/97x99 + 2/99x101 简便计算 1/1X3+1/3X5+1/5X7...1/17X19+1/19X21= 1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=? 1/1x3+1/3x5+1/5x7+.+1/2009x2011= 2/1x3+2/3X5+2/5x7=2/7x9+2/9x11 1/1x3+1/3x5+1/5x7.1/2009x2010+1/2011x2013 计算：1/1x3+1/3x5+1/5x7+...1/2009x2011+1/2011×2013 1/1x3+1/3x5+1/5x7+……+1/99x101 1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少? 1/(1x3)+1/(3x5)+1/(5x7)+.+1/(2011x2013) 等于什么 1/1x3+1/3x5+1/5x7+.+1/1997x1999 简便计算. 1X3分之1+3X5分之1+5X7分之1+...+2013X2015分之1