1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!
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1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*1
1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!
1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!
1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!
1/(1*3) + 1/(3*5) + 1/(5*7) + .+ 1/(97*99) + 1/(99*101) = (1-1/3)/2 + (1/3 - 1/5)/2 + (1/5-1/7)/2 + .+ (1/97-1/99)/2 + (1/99-1/101)/2 = [(1-1/3) + (1/3 - 1/5) + (1/5-1/7) + .+ (1/97-1/99) + (1/99-1/101)] / 2 = [(1+1/3+1/5+.+1/97+1/99) - (1/3+1/5+1/7+.+1/99+1/101)] / 2 = [ 1 - 1/101] / 2 = [100/101] / 2 = 50/101
化简1/3：1/5
1+1+5+25+3
1/3+1/5是什么意思?
1+1+2+3*5
(1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/9)*(1/3+1/5+1/7) 简算(1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/9)*(1/3+1/5+1/7) 简便计算
1+1+1+1+1-5+5-5+1+1-2+3+3+3+3-6-3-3等于多少?
5(X-3)+1
1+3+5+.+99
1 3 5题,
1、2、3、5,
1,3,5题
1-3+5-7+...
1,3、5题
1+3+5+...+2011
1,3,5题,
3 1 5是什么意思?
1/1*3+1/1*3*5+1/1*3*5*7+1/1*3*5*7*9-73/945
3/1：4/1：5/1化简是?