名校
1 . 已知函数
,下面命题正确的是_________ .
①存在
,使得
;
②存在
,使得
;
③存在常数
,使得
恒成立;
④存在
,使得直线
与曲线
有无穷多个公共点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3d74bc831a959f5d2a2b016548eba0.png)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5af267764227a538f13953d06341c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1260c6fa15a4d739a41c5de1533e9e5c.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81faf6ab77580b3d89b6aa1d802f84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee798d2d512f7342c55a0d580f4367e2.png)
③存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c46385268d3081043e04f4401b7973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf322b61457bd0bd7484b4349f537e6.png)
④存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
您最近一年使用:0次
2 . 已知平面内点集
,A中任意两个不同点之间的距离都不相等. 设集合
,
. 给出以下四个结论:
①若
,则
;
②若
为奇数,则
;
③若
为偶数,则
;
④若
,则
.
其中所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041bc291bff24b4cee0b205da68db1f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ebdde37c672e10fd4ffe741247e566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18faaff0b5622f33a1574103fed13edd.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdda00159c36552b8a9a9743324f82a0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffaac03e1e452f075e86853fef2a33de.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdda00159c36552b8a9a9743324f82a0.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25df56dc9b8169cbf924f39bfa9f7c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb931a4b3eaa34e2c6f7dab5650f8af.png)
其中所有正确结论的序号是
您最近一年使用:0次
名校
解题方法
3 .
训练师是一种新型的工作,通过向
提问,能让
软件更加准确地回答问题.
训练师需要和数据标注员紧密协作,把控好整个流程的输入规则和输出结果,最终输出标注准确的数据.通过
训练师每次提问后,
软件回答问题的正确率可能发生变化.某
软件初始回答问题的正确率记为
,设第
次训练后,可将该软件回答问题的正确率从
改变为
,其中
,
,
,
,
,
,…,给出下列四个结论:
①当
,若
,
,
时,该
软件无法通过训练提高正确率;
②若
,
时,该
软件经过第一次训练提高了正确率;
③当
,若
,
,
时,该
软件经过5次训练后,正确率高于
;
④当
,若
,
时,该
软件无论怎么训练,正确率都不高于
.
其中,所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606c4a853a6a34cb7f33bea81b15a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bb173fd5c82cc50906329c799d7eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7acd08139237eb09e2c2c2914991f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b9cbe59a1d2b42bd627cf39a5ca9f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413b91450bf15efbabb694973e4e85b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f42216b7281715819c8ea898fc5c33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad90c79c1c7cc5c3efccf9c2293e38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff682eb44cc652d0c8c4d851710d059d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60bc518996d98e09db01b185ea09b23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6562c8dee00930531f41bcd361732a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cc5311f69dd6e77afa9a165410eab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c73150b3316628735fe2f4a24cb411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad90c79c1c7cc5c3efccf9c2293e38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1640495c958581869d67940447c16d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf12d9cc58f6cf5bc17ce1f3e596a665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909fc6ee5998dc6da434bed770af6020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe157a9c3fe004a25bf1fb79c8c0a1b.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9bc7b40c522fe1724c773ae62d349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad90c79c1c7cc5c3efccf9c2293e38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66f978f670447e5c55283c89ce4f35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68806799395fdfd6408756b39636d92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbfe2ded9fc1188ac6cc2598e765317.png)
其中,所有正确结论的序号是
您最近一年使用:0次
4 . 在数列
中,
,
.给出下列三个结论:
①存在正整数
,当
时,
;
②存在正整数
,当
时,
;
③存在正整数
,当
时,
.
其中所有正确结论的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd015442628054692b8cc0a19c77d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9871684eaddd74a5ffa9f907790acdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec8e838690c44786ee8343b57904b3e.png)
①存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fe91daf4622edddc49cf828e132432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/facdd0916180bd028327e523bdcd3f52.png)
②存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fe91daf4622edddc49cf828e132432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd3e65f0f4bf3e5fb6570df7fb60510.png)
③存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fe91daf4622edddc49cf828e132432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b034b89c013225cb2117287dc0a8c61.png)
其中所有正确结论的序号是
您最近一年使用:0次
名校
解题方法
5 . 在现实生活中,一个符合实际的函数模型经常是将不同的函数组合得到的,如听音乐家演奏音乐时,我们听到的声音常常就是多种不同乐器产生的声波叠加的结果.在学习了向量和三角函数后,人大附中某研学小组利用所学知识研究若干振幅相同,同频同向的简谐波叠加后,得到新的简谐波的振幅和初相规律,该小组把
(N为正整数)叠加,研究
中的
和
,其中
.
(1)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
______ .
(2)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2073aefa188a89d515b9d32de5d89c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e289d2f03b9a42c8f61858f1c3b32e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52d236ed8d14f8135a0a63d41a351fe.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb55d413f1ab722e17747c8e99f6c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722068b39032dd59c01afdba985d65be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
您最近一年使用:0次
6 . 已知
.在
中,
设
,
定义:
.
设
或
.给出下列四个结论:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3216c7108baab2601471b965ecb5694a.png)
②
;
③若
,则
;
④
,都有
,则
最多有
个元素.
其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edec660383c08c26ff438d1b8c7a3177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c852b101e577e4b7d3af668489b0ea5.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888390fce47b31855712344fd536bce1.png)
定义:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21090f6a3148c6c09a6946c4611fcd7.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2143cab296d997c652c495982e90cb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ddbe12fb60130709d275f169dc99c22.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3216c7108baab2601471b965ecb5694a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71daa66564dc886bd4c4f19d83396fd4.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616cdc04ccc5cae9cf8b941ebeb45ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0430ebe2730db038a644d8939a0d73.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9d43ee737b96bb2cd0cc241d6e1efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2509cacc1596557ea46e0f94e84823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
其中所有正确结论的序号是
您最近一年使用:0次
7 . 如图,正方形
和矩形
所在的平面互相垂直.点
在正方形
及其内部运动,点
在矩形
及其内部运动.设
,给出下列四个结论:
,使
;
②存在点
,使
;
③到直线
和
的距离相等的点
有无数个;
④若
,则四面体
体积的最大值为
.
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef70144bea23fc8154301b246bf3ef14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f1c40ebcc993a5778478154c124f0c.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b9d4191b4dc51fddb22d1faf650c3b.png)
③到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f138877b595987abf3397aab8f9895e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3019bf62527f7e614c49b803d7b59d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
其中所有正确结论的序号是
您最近一年使用:0次
名校
解题方法
8 . 在平面直角坐标系
中,
,
.集合
,下列结论正确的是______ .
①点
;
②若
,则
;
③若
,则
的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6938eeb65411eeac15e140cf1db99773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e460725dacf5768aa8290aa52d9d24.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db7f7eb57e496985bfa77847f58345f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be2bc0b0fb98f94b86546fe2ab85de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae985f4f5ce87b3105e222f94c77899.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193029805ef60186dcc6338d847b01ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58aeae4debbb8d0c43d5f526ec7c0532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab8e57da1a24cba8a5feb1388b2fba6.png)
您最近一年使用:0次
9 . 目前发射人造天体,多采用多级火箭作为运载工具.其做法是在前一级火箭燃料燃烧完后,连同其壳体一起抛掉,让后一级火箭开始工作,使火箭系统加速到一定的速度时将人造天体送入预定轨道.现有材料科技条件下,对于一个
级火箭,在第
级火箭的燃料耗尽时,火箭的速度可以近似表示为
,
其中
.
注:
表示人造天体质量,
表示第
(
)级火箭结构和燃料的总质量.
给出下列三个结论:
①
;
②当
时,
;
③当
时,若
,则
.
其中所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0532411d57ea180b894ad7ecc3c3cd2.png)
其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbc231de2cd997f8abb79585f057f48.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1448ec3239cfb8c7872e101ab7405e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476d6d49c2989ac6cfd0c06149df251c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2429b6a233ef2f66677b15bc11a13294.png)
给出下列三个结论:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc1c64bd18987615bd40f41d4cf4a7c.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493102857cb6471c2d1f2e35c3872b55.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46ca25328bd480836d66a2b33b41b00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5becaecdd2a5481cf52f31e4930368.png)
其中所有正确结论的序号是
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10 . 整数列
,
,
,对
有
,
为固定正整数,求使
成立的
的个数______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f241a73bf197764cebade47dcd9a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401b7a6ae9616f1f3a27ff11c8abf2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed352cca4f2ffd027a1f203bc4e51bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cc773ef279d9960a90052c5b710e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f6a09c6d8b804e7214da49256f0317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b25b0878c79813d60afc929c6319434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次