1,1,1/2,1/4,1/3,1/9,按规律填分数,下两个填什么

/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/ |1/3-1/2|+|1/4-1/3|+|1/5-1/4|+...+|1/10-1/9| |1-1/2|-|1/2-1/3|-|1/3-1/4|-.-|1/9-1/10| |1-1/2|+|1/2-1/3|+|1/3-1/4|+...|1/9-1/10| ((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*((1/6)-1)*((1/7)-1)*((1/8)-1)*((1/9)-1)*((1/10)-1) （1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)简算 9*(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*(1-1/7)*(1-1/8)*(1-1/9)怎样简便计算 1*2/1+2*3/1+3*4/1+...+8*9/1+9*10/1简算 有理数:-1/2+1/3-(-1/9)-1/4= 1/1*3+1/2*4+...+1/9*11=? 计算 (1+1/2)×(1+1/3)×(1+1/4)×……×(1+1/7)×(1+1/8)×计算 (1+1/2)×(1+1/3)×(1+1/4)×……×(1+1/7)×(1+1/8)×(1+1/9) 1:8 2:9 1:9 3:4 1:3 ... (1-1/2^2)*(1-1/3)*(1-1/4^2)*…*(1-1/9^2)*(1/10^2) （1+2/1)×(1+3/1)×(1+4/1)×…×(1+9/1)×(1+10/1)用简算快! (1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/9)x(1-1/10) lim(1+1/3+1/9+...+1/3^(n1))/(1+1/2+1/4+...+1/2^(n-1)) lim(1+1/3+1/9+...+1/3^(n1))/(1+1/2+1/4+...+1/2^(n-1))急 (1-1/2)*(1+1/2)*(1-1/3)*(1+1/3)*…*(1-1/9)*(1+1/9).