(1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
1/2012-1)(1/2011-1)(1/2010-1)...(1/1949-1)=?
计算:(1/2012-1)×(1/2011-1)×(1/2010-1)×(1/2009-1)×...×(1/2011-1
(2012/1-1)*(2011/1-1)*(2010/1-1)*(2009/1-1)*(2008/1-1)*```*(
(1-1/2009+1/2010+1/2011) ×(1/2009+1/2010+1/2011+1/2012)-(1+1
(1/2012-1)*(1/2011-1)*(1/2010-1).*(1/1000-1)
(2012+1/2011)/(2011+1/2012)+(2010+1/2011)/(2011+1/2010)的简便方法
(2012分之1-1)*(2011分之1-1)*(2010分之1-1)*...*(2000分之1-1)=
(2011+2012×2010)÷(2011×2012-1)
(1/2012-1)*(1/2011-1)*(1/2010-1)*……*(1/1001-1)*(1/1000-1)
(2012/1-1)×(2011/1-1)×(2010/1-1)×……×(1001/1-1)×(1000/1-1)
(2012/1-1)×(2011/1-1)×(2010/1-1)×……×(1001/1-1)×(1000/1-1) 这道
1/(1*2010)+1/(2*2009)+...+1/(2010*1)-(2010/2011)*(1/1*2009+1