1又1/2-1/2+1/3-1/3+1/4-1/5+1/5-1/6+1/6-1/7
1-1/7
=6/7
1又1/2-1/12-1/20-1/30-1/42
2个回答
相关问题
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1又1/2+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42=?（
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1又1/20+2又1/30+3又1/42……8又1/132
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1/2-1/6-1/12-1/20-1/30-1/42
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1/2+1/6+1/12+1/20+1/30+1/42=?
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1/2+1/6+1/12+1/20+1/30+1/42=
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1又2/1+2又6/1+3又12/1+4又20/1+5又30/1+6又42/1+...+11又132/1等于几?
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计算-1/2-1/6-1/12-1/20-1/30-1/42
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1/2+1/6+1/12+1/20+1/30+1/42+……+1/110=?
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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