1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)
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1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)1+(1/2)+(1/6)+(1/12)+(
1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)
1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)
1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)
1+(1/2)+(1/6)+(1/12)+(1/20).+(1/99乘100)
=1+(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+……+(1/99-1/100)
=1-1/100
=99/100
1+(1/2)+(1/6)+(1/12)+(1/20)........+(1/9900)
=1+(1-1/2)+(1/2-1/3)+(1/3-1/4)+……+(1/99-1/100)
=1-1/100
=99/100
1/2+1/6+1/12+1/20.+1/380
2%1+6%1+12%1+20%1+30%1
1/2+1/6+1/12+1/20+1/30
1/2-1/6-1/12-1/20-...-1/110
1/2,-1/6,1/12,-1/20,1/30
2/1+6/1+12/1+24/1+48/1
1/2+1/6+1/12+1/20+.1/90
2/1+6/1+12/1+20/1+...+2450/1
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1+1/2+1/12+1/6+1/20+1/30+1/40+1/56
(1-1/2)+(1-1/6)+(1-1/12)+...+(1-1/110)=?
1/2+1/6+1/12+...+1/4054182 等于多少?
1/2+1/6+1/12+...+1/56=快
1/2+1/6+1/12+1/20=
1/2+1/6+1/12+.1/9900
1/2+1/6+1/12+.+1/9900
1/2+1/6+1/12+...+1/72简便运算