1(1)(2)(3)(4)

1/3,2/3,1/3,1/4,2/4,3/4,2/4,1/4,( ),( ),( ),( ),( ),( ),( ) “1”“2”“3”“4” 1+2+3×4 (1+1/2+1/3+1/4+1/5)*(1/3+1/4+1)-(1+1/3+1/4)*(1/2+1/3+1/4+1/5 1+1 2+2 3+1 4+4 51+1 1/3+1/2+1/4 1/2 1/3 1/4是勾股数吗 2(3+1)(3^2+1)(3^3+1)(3^4+1)(3^8+1)+1 提问题(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1/2+1/3+1/4)×(1+1/2+1/ 2+2+3+4+1 奥数六年级1/2/(1+1/2)+1/3/(1+1/2)(1+1/3)+1/4/(1+1/2)(1+1/3)(1+1/4 (1+1/2+1/3+...+1/2006)*(1/2+1/3+1/4+...1/2007)-(1+1/2+1/3+..