1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?
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1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?1/(1*3)+1/(3*5)+
1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?
1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?
1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)等于多少?
1/(1*3)+1/(3*5)+1/(5*7)+----1/(97*99)
=1/2[1-1/3]+1/2[1/3-1/5]+...+1/2[1/97-1/99]
=1/2[1-1/3+1/3-1/5+...+1/97-1/99]
=1/2*[1-1/99]
=1/2*98/99
=49/99
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?