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数学
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1/6+1/12+1/20+1/30+……+1/9900=?
人气:301 ℃ 时间:2020-06-11 01:47:39
解答
=1/2*3+1/3*4+1/4*5+……+1/99*100
=1/2-1/3+1/3-1/4+1/4-1/5+……+1/99-1/100
=1/2-1/100
=49/100
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1/2+1/6+1/12+1/20+1/30+……+1/9900 是多少?
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谁能够告诉我1/2+1/6+1/12+1/20+1/30+……+1/9900=?
1/2+1/6+1/12+1\20+1/30+1/42+.+1/9900=?
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