(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 09:58:09
(1-1/2009+1/2010+1/2011)×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/201
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
令a=1/2009+1/2010+1/2011
原式=(1+a)(a+1/2010)-(1+a+1/2010)a
=(1+a)a+(1+a)*1/2010-(1+a)a-a*1/2010
=1/2010+a*1/2010-a*1/2010
=1/2010
我编的程序,算出来的结果是0
1/2012
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1/2009+1/2010+1/2011+1/2012)×(1/2009+1/2010+1/2011)=?
|1/2012-1/2011|+|1/2011-1/2010|+|1/2010-1/2009|-|1/2009-1/201
计算 |1/2011-1/2010|+|1/2010-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|计算 |1/2011-1/2010|+|1/2010-1/2009|+|1/2009-1/2008|+...+|1/3-1/2|+|1/2-1|
1/2009*2010+1/2010+1/2011
-1+2-3+4-5+6-7.-2009+2010=?
计算1/1*2010+1/2*2009+1/3*2008+...+1/2010*1-2010/2011(1/1*2009+1/2*2008+...+1/2009*1)
计算1/1*2010+1/2*2009+1/3*2008+...+1/2010*1-2010/2011(1/1*2009+1/2*2008+...+1/2009*1)
(2011/1-1)(2010/1-1)(2009/1-1)…(3/1-1)(2/1-1)
(1/2010-1)*(1/2009-1)*(1/2008-1)*...*(1/3-1)*(1/2-1)尽快.
[1+2+3+4+5+...+2009+2010]/[(1-1/1006)(1-1/1007)...(1-1/2009)(1-1/2010)]
[1+2+3+4+5+...+2009+2010]/[(1-1/1006)(1-1/1007)...(1-1/2009)(1-1/2010)]
1/(1*2010)+1/(2*2009)+...+1/(2010*1)-(2010/2011)*(1/1*2009+1/2*2008+...+1/2009*1)
计算1/2010*1/2009*…*1/2*1*2*…*2009*2010
计算 |1/2011-1/2010|+|1/2010-1/2009|=+|1/2009-1/2008|+..+|1/2-1|= 计算 |1/2011-1/2010|+|1/2010-1/2009|=+|1/2009-1/2008|+..+|1/2-1|
(2011+1/2009)×1/2010
计算|1/2011-1/2010|+|1/2010-1/2009|+|1/2009-1/2008|+...+|1/2-1|急!
(1-1/2)(1/3-1)(1-1/4)(1/5-1)``````(1/2009)(11/2010)