Prove that ∫(1,∞) 1/x dx=∞

放放风2022-10-04 11:39:541条回答

Prove that ∫(1,∞) 1/x dx=∞
(as a Lebesgue integral).
证明 ∫(1,∞) 1/x dx=∞ (勒贝格积分)

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17143236 共回答了22个问题 | 采纳率90.9%
考虑这样一个数列an=(R)∫(1,n) 1/x dx=ln(n),
由于这是一个在闭区间上R可积的积分,所以必然L可积且积分相等,在任意m>0,存在N当n>N时有an>M.简单思路就是这样,具体的东西还得你自己去看.
1年前

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Such as the well-known Mona Lisa which is displayed at The Louvre museum in Paris,we cannot prove that is authentic.
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aware of:知道
tell the real from counterfeit/false:辨别真假.
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authentic:真的(一般形容物品的真伪.)
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