(1-1/2^2)(1-1/3^2)(1-1/4^2)(1-1/5^2)(1-1/6^2)(1\1/7^2)(1-1/8
(1-1/2^2)(1-1/3^2)(1-1/4^2)(1-1/5^2)(1-1/6^2)(1\1/7^2)(1-1/8
(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1
(2+1)(2^2+1)(2^3+1)(2^4+1))(2^5+1)(2^6+1)(2^7+1)(2^8+1)(2^9+
求证:1+1/2+1/3+1/4+1/8+1/6+1/7+^+1/(2n-1)>n/2
1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少?
(1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10+1/11+1/12+1/13+1/14+1/
一道数学题.|1-1\2|+|1\2-1\3|+|1\3-1\4|+|1\5-1\6|+|1\7-1\8|+|1\9+1
(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
1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9.+1/999 求解答
1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10等于多少?
1/2+1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+1/6*1/7+.1/1999*1/2000得多
1、求|1-1/2|+|1/2-1/3|+|1/3-1/4|+|1/4-1/5|+|1/5-1/6|+|1/6-1/7|