【1】-1+(-2)+3
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
(1) -6,-3,2,-1,)
1、1、2、3、5、( )、( ).
1、1、3、2、5、()、()
(1) 1,1/3,1/5,1/7,1/9 (2)- 1/2*1,1/2*2,- 1/2*3,1/2*4,-1/2*5
(1/2014-1)(1/2013-1)(1-2012-1)...(1/3-1)(1/2-1)
(-1×1/2)+(-1/2×1/3)+(-1/3×1/4)+…+(-1/2008×1/2009)
一道奥数题,急救!(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/
(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...×(1+1/99)×(1-1/99)=?
(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)*...(1+1/2006)*(1-1/2006)怎么简算
巧算(奥数题)问:(1+1/2)×(1-1/2)×(1+1/3)×(1-1/3)×...(1+1/99)×(1-1/99
关于数学巧算(1)(3+1)(3^2+1)(3^4+1)(3^5+1)...(3^2n+1)(2) (1+1/2)(1+