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Converge还是Diverge呢?
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请问以上的series是converge还是diverge? |
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发表于 6-4-2010 09:50 PM
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回复 1# 無聊人
5/(7 + ln n) < 5/(ln n)
Let a_n=5/(7 + ln n), b_n=5/(ln n)
Using limit comparison test: lim(n->infinity) a_n/b_n = 1 > 0
5/(ln n) converges, so 5/(7 + ln n) by limit comparison test.
可是我忘了怎样show 5/(ln n) converges了,我只记得它是converge的。 |
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发表于 7-4-2010 06:34 PM
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Leibniz series, memang converge ! |
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发表于 9-5-2012 11:31 AM
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回复 1# 無聊人
diverge
but by leibnitz test , it is converge conditionally . |
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发表于 21-5-2012 10:25 PM
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如果是diverge
sum是多少?
至少给一个范围 |
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发表于 23-5-2012 12:04 AM
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回复 5# puangenlun
sum does not converge ... |
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发表于 24-5-2012 01:51 AM
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