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将日期集合里星期一到星期日的七个集合求并集能到什么集合?()
A . 自然数集
B . 小数集
C . 整数集
D . 无理数集
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将日期集合里星期一到星期日的七个集合求并集能到什么集合?
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设0<λ<1,,证明:
设0<λ<1,<img src='https://img2.soutiyun.com/ask/2020-12-15/976886971942264.png' />,证明:
<img src='https://img2.soutiyun.com/ask/2020-12-15/976887004344117.png' />
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设:X→Y是函数,证明:
设:X→Y是函数,<img src='https://img2.soutiyun.com/ask/2021-02-01/981034124599643.png' />证明:
<img src='https://img2.soutiyun.com/ask/2021-02-01/98103413205407.png' />
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设n为正整数,证明不等式.
设n为正整数,证明不等式<img src='https://img2.soutiyun.com/ask/2020-12-12/976625365926413.png' />.
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设0<a<,证明存在,使得
设0<a<<img src='https://img2.soutiyun.com/ask/2020-11-29/975511256468394.png' />,证明存在<img src='https://img2.soutiyun.com/ask/2020-11-29/975511300847932.png' />,使得
<img src='https://img2.soutiyun.com/ask/2020-11-29/975511326354391.png' />
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设向量组证明:如果
设向量组<img src='https://img2.soutiyun.com/ask/2020-11-16/974393840454038.png' />证明:如果
<img src='https://img2.soutiyun.com/ask/2020-11-16/974393851876691.png' />
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设证明:当|h|足够小时,有
设<img src='https://img2.soutiyun.com/ask/2020-12-12/976626633902937.png' />证明:当|h|足够小时,有
<img src='https://img2.soutiyun.com/ask/2020-12-12/97662664672767.png' />
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设f(x)在上连续,且,证明
设f(x)在<img src='https://img2.soutiyun.com/ask/2021-02-02/981108508925152.png' />上连续,且<img src='https://img2.soutiyun.com/ask/2021-02-02/98110851624057.png' />,证明
<img src='https://img2.soutiyun.com/ask/2021-02-02/981108523349977.png' />
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设p是一素数,证明:
<img src='https://img2.soutiyun.com/ask/2020-09-28/970161617889149.png' />
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设A为n阶矩阵,证明
<img src='https://img2.soutiyun.com/ask/2020-12-29/978119580902376.png' />
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设P,Q为任意集合,证明:。
设P,Q为任意集合,证明:<img src='https://img2.soutiyun.com/ask/2020-12-18/97715514920546.jpg' />。
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设,,证明:;并求下列极限:
设<img src='https://img2.soutiyun.com/ask/2020-12-15/976895300573634.png' />,<img src='https://img2.soutiyun.com/ask/2020-12-15/976895311426255.png' />,证明:<img src='https://img2.soutiyun.com/ask/2020-12-15/976895323305934.png' />;并求下列极限:
<img src='https://img2.soutiyun.com/ask/2020-12-15/976895333998546.png' />
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设z=ln(√x+√y),证明
设z=ln(√x+√y),证明<img src='https://img2.soutiyun.com/ask/2020-09-25/96987851918291.png' />
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设证明:(1)(2)若
设<img src='https://img2.soutiyun.com/ask/2020-11-27/975351283558174.png' />证明:
(1)<img src='https://img2.soutiyun.com/ask/2020-11-27/975351295964883.png' />
(2)若<img src='https://img2.soutiyun.com/ask/2020-11-27/9753513102387.png' />
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设其中对任意A,证明:
设<img src='https://img2.soutiyun.com/ask/2020-08-13/966163453868782.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/50571001-50574000/50572516/spacer.gif' />其中对任意A,<img src='https://img2.soutiyun.com/ask/2020-08-13/966163468046592.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/50571001-50574000/50572516/spacer.gif' />
证明:<img src='https://img2.soutiyun.com/ask/2020-08-13/966163482068394.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/50571001-50574000/50572516/spacer.gif' />
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设,证明:存在。
设<img src='https://img2.soutiyun.com/ask/2020-12-04/975937657672878.jpg' />,证明:<img src='https://img2.soutiyun.com/ask/2020-12-04/975937673817802.jpg' />存在。
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设,证明函数f的最小值为0。
设<img src='https://img2.soutiyun.com/ask/2021-01-29/980784764887205.png' />,证明函数f的最小值为0。
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设(1)证明f(x)在[0,+∞)上可导,且一致连续;(2)证明反常积分发散。
设<img src='https://img2.soutiyun.com/ask/2021-01-28/980692750486118.png' />
(1)证明f(x)在[0,+∞)上可导,且一致连续;
(2)证明反常积分<img src='https://img2.soutiyun.com/ask/2021-01-28/980692795149672.png' />发散。
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设,且,证明:.
设<img src='https://img2.soutiyun.com/ask/2020-12-16/976960112441656.png' />,且<img src='https://img2.soutiyun.com/ask/2020-12-16/976960124256331.png' />,证明:<img src='https://img2.soutiyun.com/ask/2020-12-16/976960234626644.png' />.
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(1)设,证明:
(1)设<img src='https://img2.soutiyun.com/ask/2020-12-16/976960753843342.png' />,证明:
<img src='https://img2.soutiyun.com/ask/2020-12-16/976960764926976.png' />
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设f(x)在(-∞,+∞)上连续,证明
设f(x)在(-∞,+∞)上连续,证明
<img src='https://img2.soutiyun.com/ask/2020-12-16/976976920461019.png' />
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设是非空有界集,证明:
设<img src='https://img2.soutiyun.com/ask/2020-12-18/977157342761925.png' />是非空有界集,证明:
<img src='https://img2.soutiyun.com/ask/2020-12-18/977157351089401.png' />
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设数列{xn }有界,又 =0,证明: =0.
设数列{xn }有界,又<img src='https://img2.soutiyun.com/ask/2020-11-09/973789504266565.png' />=0,证明:<img src='https://img2.soutiyun.com/ask/2020-11-09/973789512637362.png' />=0.