1 . 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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2 . (1)设
是一个大于3的素数.求
的值;
(2)设
是大于3的自然数.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2622931bc3a6c168433bdbe4ad096a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ceb2844066ea0fe260d8489000eab60.png)
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3 . 已知
.则
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0745ba70a504a1fecd77558d8e3a9d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32681724b11af443bd6422c46784af15.png)
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4 . 设自然数
,
个不同的自然数
有下列性质:对集合
的任何两个不同的非空子集
,
,
中所有数的和与
中所有数的和都不会相等.在上述条件下,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2b043b989216035c6fd985f1dd6a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca8b5feb1c104dd1076ae7bd3aa68d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20eccbc284154585564526596c96e65.png)
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5 . 在四面体
中,棱
,
的长分别为
和
,这两棱中点的距离为
.则四面体
的体积的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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6 . 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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7 . 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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8 . 至少有一个数字是6的四位数中,有______ 个是3的倍数.
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9 . 过正
的中心
作直线分别与
,
交于点
,
.若
,
,则该正三角形的边长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ed04c4ea1abe97c7dd2f3e95dc0eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af9774200946261f0ccba3e6eeba9d.png)
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10 . 设
是集合
的一族不同的子集,它们两两的交都不是空集,而
的其他子集不能与
的交都是非空集合,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a1b67cba05008065719a2cdfe406ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959fc4686fc7f7772ef9e2b0b4d58786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2506b792ce3132934049a22db27da31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
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