1 . 一般地,证明一个与正整数n有关的命题,可按下列步骤进行:
(1)(归纳奠基)证明当
时命题成立;
(2)(归纳递推)以“当
时命题成立”为条件,推出“当
时命题也成立”.
只要完成这两个步骤,就可以断定命题对从
开始的所有正整数n都成立,这种证明方法称为数学归纳法.
已知集合A为有理数集Q的一个子集,且满足以下条件:
①
且
;
②对任意的
,存在唯一的
,满足
,其中
,
表示不超过y的最大整数;
③若
,
,则
.
证明:
(1)
;
(2)对任意的
,对每一个整数
,都有
;
(3)
.
(1)(归纳奠基)证明当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc7fd4f6a47738eb0550757ab6f6cbf.png)
(2)(归纳递推)以“当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16743b46792d3250ede27f695612003a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
只要完成这两个步骤,就可以断定命题对从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7e9f86738335a22298559db41037a4.png)
已知集合A为有理数集Q的一个子集,且满足以下条件:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2faf3937abcb6a59071c17bc6bb10f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9230efa8ff1efbcc68807463b2e3667f.png)
②对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f08f548d6b0614f2ad7b0c1047933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc020b0997a2f37b214718112b79d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696847df2559122bf0c233b6abfffbb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba442c768f815a974b46e16d5d44a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e882720ab8ef046c8a2202a7708bc12.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc020b0997a2f37b214718112b79d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562bd74953e06c2d86b8394b6ac7a4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27d98d9468d77471b59b8cb5087b7dc.png)
证明:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d829efc0731be8e78396063e8ea843be.png)
(2)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b18b109a656b62fb173680ae99ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbcf6e474d52114f7fe274d2458ec86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce27c6d015f8be1fe6ac337b41be9dde.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6da66f26c25a3527cb9771a4ebd6db2.png)
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2 . 数学归纳法是一种数学证明方法,通常被用于证明某个给定命题在整个(或者局部)自然数范围内成立.证明分为下面两个步骤:1.证明当
(
)时命题成立;2.假设
(
,且
)时命题成立,推导出在
时命题也成立.用模取余运算:
表示“整数
除以整数
,所得余数为整数
”.用带余除法可表示为:被除数=除数×商+余数,即
,整数
是商.如
,则
;再如
,则
.当
时,则称
整除
.现从序号分别为
,
,
,
,…,
的
个人中选出一名幸运者,为了增加趣味性,特制定一个遴选规则:大家按序号围成一个圆环,然后依次报数,每报到
(
)时,此人退出圆环;直到最后剩1个人停止,此人即为幸运者,该幸运者的序号下标记为
.如
表示当只有1个人时幸运者就是
;
表示当有6个人而
时幸运者是
;
表示当有6个人而
时幸运者是
.
(1)求
;
(2)当
时,
,求
;当
时,解释上述递推关系式的实际意义;
(3)由(2)推测当
(
)时,
的结果,并用数学归纳法证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca4f2b82d9d7a8323c8d697338a6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ed0d20a923abd9a4c8bc72e503d302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10f2f74e201f77f853e9ed9078615c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453a099f765d8c4a54a7a8f548b1b158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed42522ccb5fef607df8b71fcca03bcd.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac646e0d7a0fe3da13af10a4d6b7a7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c11459ed580667182b973830b7930a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f2b6418c6ff728016faa9f1d5926b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a88d12a6122318453b528d0b7039df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825857618aaf55138ad1b008bf27d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1d0df209f53d2331c6ec769b81a268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ac49ab7c8001c209b8611b9ea40d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346f2f0d0ac7cf381bc8dedfba28a50a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b2019c578fb0c606c2d7bc6b2ecde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a23fc4d9afa54c10d64bf048b235da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba21bebb9b0f51cdc2f4f3f88d04dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b3f774c75236a4df0872fec3982c0f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a21c193f9123c196ac441c808c941d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5753205b9c37cf47a6e79c2e1bf6634e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856b137a34d2d5b20671b7a3c7a29606.png)
(3)由(2)推测当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e56a7ba76370a9c5dee9fb8cf778b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10f2f74e201f77f853e9ed9078615c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb732266164b63ae157799fc05fefef8.png)
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3 . 公式
,其等号右侧展开式共有
类非同类项,
的展开式共有
类非同类项;那么
的展开式共有______ 类非同类项,
的展开式共有______ 类非同类项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75713ee82f031d9fe19a9e2313cb0791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2323018b5cc23209e4423c32efbde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07d08a453c4e36629e860d67057a3cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12992a0ad8592e2c58197d1382a3f0dd.png)
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4 . 已知
为有穷正整数数列,
,且
.从
中选取第
项,第
项,
,第
项
,称数列
,
为
的长度为
的子列.规定:数列
的任意一项都是
的长度为1的子列.若对于任意的正整数
,数列
存在长度为
的子列
,使得
,则称数列
为全覆盖数列.
(1)判断数列
和数列
是否为全覆盖数列;
(2)在数列
中,若
,求证:当
时,
;
(3)若数列
满足:
,且当
时,
,求证:数列
为全覆盖数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6089fe00ae7015041da535c55ea04a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ea59f1c1a0d85dd6bec266e5270cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a0ab9b965cac0ac2bbee007b5343d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5f59bc23cf55f56312c9ed9806371f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6af9e7b1c23db5584ad8521d4444d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608d034715f9b1dfb306f9c89d383582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e636879245230dd00a3ab3cbcfbfd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b78937e77b8af5fb0fc2289aa3281f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29c5650949891380e29f64fa64b46f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe39a14cd55b5db170bd070b808ec63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7059e1f61ea8ec9ec3964af3ea588759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3750937ff180de90d13726ca22cc456b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(1)判断数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e7ec4f442ae834ca2ed9d168d7d9e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a2a8194c260def0080f507775fc628.png)
(2)在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e2d4b414b02d127b831c48bb6edb0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5059e492214c793847f8a11dffff0b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfb6929aee480560b6e53acb2e69ba8.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5059e492214c793847f8a11dffff0b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fde80fb262f5dcb2dd5e7fcfd96d7c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解题方法
5 . 将数列
中项数为平方数的项依次选出构成数列
,此时数列
中剩下的项构成数列
;再将数列
中项数为平方数的项依次选出构成数列
,剩下的项构成数列
;….如此操作下去,将数列
中项数为平方数的项依次选出构成数列
,剩下的项构成数列
.
(1)分别写出数列
的前2项;
(2)记数列
的第
项为
.求证:当
时,
;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6eeca9796e257f38d63258509d1048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab7a9ae961c733c48bc5782d9e1ed59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e23e6ef7192b7390f5128911f2eddc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7688363f5ffff23a6193c7a8eee501c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e194d06db1129edf38b94579d9f4889f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5815cc29f60d2aa538c4dd30e0803a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf764059194422cdfdf522917671a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7f2c72ab559a0615db4c51327b78d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dd57541d525ff3cfe31ca52d0071ec.png)
(1)分别写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfefd19874aeff8340735b3df468333.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e058f4325169eafcc30081eaf45327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b181461be9ae04c27783ed29e739f904.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3c19f96faf4fbf3b0d5e712f609ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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名校
6 . 已知函数
的定义域为
,对于任意实数
均满足
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11566d997986b66d6c05e0206ead57e.png)
________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc86b6c345d52fcee1abfc9da735805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9da4fdfdddc259dcef9fdd4b826b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765d6fea26d8e02b91525cfb02914058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11566d997986b66d6c05e0206ead57e.png)
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2024-05-04更新
|
415次组卷
|
2卷引用:四川省成都市石室中学2024届高三下期三诊模拟考试文科数学试卷
7 . 已知无穷数列
是首项为1,各项均为正整数的递增数列,集合
.若对于集合A中的元素k,数列
中存在不相同的项
,使得
,则称数列
具有性质
,记集合
数列
具有性质
.
(1)若数列
的通项公式为
写出集合A与集合B;
(2)若集合A与集合B都是非空集合,且集合A中的最小元素为t,集合B中的最小元素为s,当
时,证明:
;
(3)若
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d70b1ef068e07c0ed707c17c11ffd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82079a5446d448fb1bea730b968d7e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9652602f1d23494c53743efe03db6bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e577f08c801db946d97a024545bb5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0380d25c8bccf9b2abdb668fb1bc5400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259af6f2d42a977dc6db0da888f6428a.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec7ba4ecbcc20bfb5b7b3f473050eb0.png)
(2)若集合A与集合B都是非空集合,且集合A中的最小元素为t,集合B中的最小元素为s,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682cbe4cd0d5cf5beb79d3ab89a117f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997ba7c3da0821973b7f44d2ca07fcd1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a9b7c16226569966db27c11982f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
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8 .
,求所有的
,使得
中有无穷多项为正整数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad039ab9ca99b3d62b798884e8988b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629507dcfdeb6866da428c4f45e2b21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
解题方法
9 . 斐波那契数列因意大利数学家斐波那契以兔子繁殖为例引入,故又称为“兔子数列”,即1,1,2,3,5,8,13,21,34,55,89,144,233,….在实际生活中,很多花朵(如梅花、飞燕草、万寿菊等)的瓣数恰是斐波那契数列中的数,斐波那契数列在现代物理及化学等领域也有着广泛的应用.斐波那契数列
满足:
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8323901a49cac29afd7d62864f088077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef91c948ec388a8c0ed5ecb443c2f76.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024·山东·模拟预测
10 . 将数列
从首项开始从左到右依次排列,得到数组
,
,
,…,
,然后执行以下操作:将
移到
右侧,然后剔除
,再将
移到
右侧,然后剔除
,继续以上操作,即将最左边的数移到最右边,然后剔除新数组最左边的数,直到剩下最后一个数
.若令此操作为
,则
,且确定
的值可确定
的值,如
,
,
.
(1)证明:
;
(2)证明:
;
(3)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354feaea520a5a8be1a23491d8d5a338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11d9b67e005c4a598b63cf77d2f8444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68af8d457cb86ace285b58beed4481ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60581b1690e001201b5db7c17d2d9a6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940b6a01805abaf331c42fa30fee999e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bcf93832ee27c7bca8832ae48eba6c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee74648f3750bd91f96cc165eb5ea95b.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf41559b6cce92cc5997d3179b2a7483.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6583dc871d2fd9ee2bb4816b6b3198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3d5dc3c54741677409d2dc5ba8093e.png)
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