1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/25 11:51:08
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?1/2012-1)(1/
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
(1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)
=(-2011/2012)(-2010/2011)(-2009/2010)...(-1948/1949)
=1948/2012 (2012到 1949有64个数,所以取正号)
=487/503
!!!
(2012-1/2012)除以2011/2012
(2012+1/2011)/(2011+1/2012)+(2010+1/2011)/(2011+1/2010)的简便方法
(1/2012-1)*(1/2011-1)*(1/2010-1).*(1/1000-1)
计算:(1/2012-1)×(1/2011-1)×(1/2010-1)×(1/2009-1)×...×(1/2011-1)×(1/2000-1)
利用乘法公式计算:2012²-2011²/(2011+1)(2011-1)-2011²
(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+2/2012+3/2012+...+2011/2012+2012/2012=()
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
(1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
(1/2012-1)×(1/2011-1)×(1/2010-1)×…×(1/2000-1)
计算:1/2+1/6+1/12+1/20+1/30+...+1/(2010*2011)+1/(2011*2012)
(-1/2)^2012+(-1/2)^2011=?
(1/2013-1)(1/2012-1)(1/2011-1)…(1/3-1)(1/2-1)=
1+(-2)+3+(-4+)…+2011+(-2012)
1+(-2)+3+(-4)+...+2011+(-2012)
初中数学: (2010*2011*2012*2013+1)/(2011*2011+2010) -2011*2011
2011乘2013乘(1/2011乘2012+1/2012乘2013)简便运算