(1/2008-1)*(1/2007-1)*(1/2006-1)*...*(1/3-1)*(1/2-1)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 21:29:31
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(1/2008-1)*(1/2007-1)*(1/2006-1)*...*(1/3-1)*(1/2-1)
(1/2008-1)*(1/2007-1)*(1/2006-1)*...*(1/3-1)*(1/2-1)
(1/2008-1)*(1/2007-1)*(1/2006-1)*...*(1/3-1)*(1/2-1)
变形为:(-2007/2008)*(-2006/2007)*(-2005/2006)*.*(-2/3)*(-1/2)=-1/2008
把括号里的变一下就可约分了,自己拿笔划下.
楼下的大哥2007个好不!
(1/2008-1)*(1/2007-1)*(1/2006-1)*...*(1/3-1)*(1/2-1)
=(-2007/2008)*(-2006/2007)*(-2005/2006)*…*(-2/3)*(-1/2)
然后约分……自己拿笔画画看……
=1/2008【总共有2008个分数,所以得正数(负负得正嘛~~)】
2007+2008×2006分之2007×2008-1
2007÷(2007+2007/2008)+1/2009
2007/2008+9×2007/2008+99×2007/2008+1/502
比较(2007^2007+1)/(2007^2008+1)与(2007^2006+1)/(2007^2007+1)的大小
(1+1/2007+1/2008)*(1/2007+1/2008+1/2009)-(1+1/2007+1/2008+1/2009)*(1/2007+1/2008)详解
|1/2009-1/2008|+|1/2008-1/2007|+|1/2007-1/2006|-|1/2006-1/2009|
(2007+2008*2006分之2007*2008-1)+2007
2006×2008×(1/2006×2007+1/2007×2008)怎么算?
2009又1/2007*2007/2008
2008×2009-1分之2008+2009×2007
2008+2009×2007/2008×2009-1
2008+2007+2009/2008*2009-1
2008+2009*2007/2008*2009-1
计算|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=( )
计算:|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|
初一数学|1/2007-1/2006|-|1/2008-1/2006|+|1/2008-1/2007|
计算:|1/2009-1/2008|+|1/2008-1/2007|-|1/2009-1/2007|=
|1/2007-1/2006|+|1/2008+1/2006|+|1/2008-1/2007|