是1/6+1/12+1/20+1/30+1/42吧
1/6+1/12+1/20+1/30+1/42=1/2 - 1/3 + 1/3 - 1/4 +1/4 -1/5 +1/5 -1/6 +1/6-1/7=1/2 -1/7=5/14
1/6+12/1+20/1+30/1+42/1=
2个回答
相关问题
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1/6+1/12+1/20+1/30+1/42
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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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1/2+1/6+1/12+1/20+1/30+1/42=
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1/6+1/12+1/20+1/30+1/42 简算
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1/6+1/12+1/20+1/30+1/42 = = = = 简便运算
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计算-1/2-1/6-1/12-1/20-1/30-1/42
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1/6+1/12+1/20+1/30+1/42+1/56=多少
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1/2+1/6+1/12+1/20+1/30+1/42+……+1/110=?