1 . 数列
满足:
是大于1的正整数,试证明:在数列
中存在相邻的两项,它们除以
余数相同.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c4d9c843ed628701f262f3e80ccb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e51235780886a13ff7ab8918e97d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2 . 求证:不存在无穷多项的素数数列
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3db98df39efe5b4b383c79b875b5b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb69ab95d91fd052019c50f5b8c04df.png)
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3 . 在半径为1的圆内任给14个点,求证:其中必有两点的距离小于0.72.
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4 . (1)设
,求证:
,并说明等号成立的条件;
(2)若实数
使得对于任意实数
,不等式
都成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec981b27a6a36866802969a4dd3b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c823f01b9cc8e91c5054bb0c064e592.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c457db9529d752220d5127e334df602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908c65ced8b88fb6a3b81b2cadae29cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 设
,
.
(1)求证:
;
(2)求和:
.
其中,
表示不超过实数
的最大整数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d9a91cf16da4ff2674ca8d25b921ad.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502d9c466786f8dff909fd186525dcc7.png)
(2)求和:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428cead64a88cd2070eee07cfcfbdd42.png)
其中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 . 设
,
是两个实系数非零多项式,且存在实数
,使
.记
,
.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafc8ebb554d7c6be0473eaed9dcc7a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f958b1768c0e2758b2742d1e3ff434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1b8bce68d77b940580499d5aaf3477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a91538f6ea385abf428ef5c02c18a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2065d3b56c5cffd3768604ffa98fa445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252679cb6095899d5696b603906e4947.png)
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7 . 设
是正整数,且没有两个是相邻的,又对于
.求证:对每一个正整数
,区间
中至少含有一个完全平方数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d91a45aafd0e5b02da91dabf15960c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f33cdf052d7a9ab0caca83de507fe5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e26a278f9577ef082d346b03607360d.png)
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8 . 设
是锐角三角形,在
外分别作等腰
,
,
.在这三个三角形中,
,
,
是直角.又在四边形
外作等腰
,
是直角.求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0773ef97c87725335faeaa95163e9121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cbb2136f494b636d32034eface2ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060705794ef87cc71dac40c57f27b1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e152c7ab6ce9602ca73d5da3f0fa1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9c1f737fef878e58e5398dd74158a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ca0ea573af39647bbb44977ed1eeb2.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f66223f7a93a035a1c2cce2e52cf55.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af08f32e7336122304abaf88660941f.png)
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9 . 已知
个正整数
满足
,其中任意两个
,
的最小公倍数都大于
.求证:
.(
表示
的整数部分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36087ba4d3ca5bc4e936bed8c1d40c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0df57273c05f0502a38c9455736773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e74a53b443fe1b4e68f15517fe615e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbecbb96327b066b1ae2bccb53867bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77f5809fdddfbc912d0eacba3c831f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b0eb7d0ff6631a03c9c867d919d7e1.png)
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