1+1/2+1/12+1/6+1/20+1/30+11/40+1/56
=1+2/2一1/2+1/3-1/4+1/2 -1/3+1/4-1/5+1/5-1/6+1/5—1/8+1/8-1/7=1+1+1/5-1/7
=2又2/35
1+1/2+1/12+1/6+1/20+1/30+1/40+1/56
1个回答
相关问题
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1/2+1/6+1/12+1/20+1/30+1/40+1/56
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2/1+6/1+12/1+20/1+30/1+42/1+56/1=?
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1/2+1/6+1/12+1/20+1/30+1/42+1/56
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2/1+6/1+12/1+20/1+30/1+42/1+56/1=?
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2/1+6/1+12/1+20/1+30/1+42/1+56/1=
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1/2+1/6+1/12+1/20+1/30+1/42+1/56
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1/2+1/6+1/12+1/20+1/30+……+1/40=?
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1／2 + 1／6 + 1／12 + 1／20 + 1／30+ 1／42 + 1／56 + 1／72＝
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1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=?
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1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72=?