8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算

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8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算8-2/3-2/15

8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算
8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算

8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/256简算
最后一个减数应该是2/255吧
原式=8-(3-1)/(1*3)-(5-3)/(3*5)-(7-5)/(5*7)-……-(17-15)/(15*17)
=8-1+1/3-1/3+1/5-1/5+1/7-……-1/15+1/17
=7+1/17
=120/17