名校
解题方法
1 . 关于函数
,下列说法正确 的是___________ (将正确的序号写在横线上)
(1)
是以
为周期的函数;
(2)当且仅当
时,函数取得最小值
;
(3)
图像的对称轴为直线
;
(4)当且仅当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6147f7415778069741eccb806d7c06.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
(2)当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb91817c6cdf6fe093685db136b9d1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3307ab09aef2ccf4021576335f8aef.png)
(4)当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbacbe2d8fe3d71e3be53d8bfc34a97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a9bd95ea122a401c88fce15f8bf1d3.png)
您最近一年使用:0次
2021-01-04更新
|
950次组卷
|
4卷引用:黑龙江省双鸭山市第一中学2020-2021学年高一上学期第二次月考数学试题
黑龙江省双鸭山市第一中学2020-2021学年高一上学期第二次月考数学试题(已下线)专题02 三角函数 三角恒等变换(难点)-2020-2021学年高一数学下学期期末专项复习(北师大版2019必修第二册)(已下线)第7章《三角函数》 培优测试卷(二)-2021-2022学年高一数学上册同步培优训练系列(苏教版2019)江西省宜春市万载中学2021-2022学年高一(普通班)下学期期中考数学试题
名校
2 . 某厂商为推销自己品牌的可乐,承诺在促销期内,可以用3个该品牌的可乐空罐换1罐可乐.对于此促销活动,有以下三个说法:
①如果购买10罐可乐,那么实际最多可以饮13罐可乐;
②欲饮用100罐可乐,至少需要购买67罐可乐:
③如果购买
罐可乐,那么实际最多可饮用可乐的罐数
.(其中
表示不大于x的最大整数)
则所有正确说法的序号是__________ .
①如果购买10罐可乐,那么实际最多可以饮13罐可乐;
②欲饮用100罐可乐,至少需要购买67罐可乐:
③如果购买
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034983375860d2b404f6fbd7d40a44b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151310a626759008b4f11293ef99550c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
则所有正确说法的序号是
您最近一年使用:0次
2021-01-26更新
|
775次组卷
|
6卷引用:北京市西城区2020-2021学年高一上学期期末考试数学试题
北京市西城区2020-2021学年高一上学期期末考试数学试题北京市第四中学顺义分校2020~2021学年度高一上学期数学期末试题(已下线)综合测试复习卷(提升优化一)-2021-2022学年高一数学同步精品课堂讲+例+测(苏教版2019必修第一册)(已下线)第02讲 函数与数学模型(教师版)-【帮课堂】2021-2022学年高一数学同步精品讲义(苏教版2019必修第一册)辽宁省鞍山市2022-2023学年高一上学期期末数学试题北京市第十三中学2023-2024学年高一上学期期中测试数学试题
名校
解题方法
3 . 生态学研究发现:当种群数量较少时,种群近似呈指数增长,而当种群增加到定数量后,增长率就会随种群数量的增加而逐渐减小,为了刻画这种现象,生态学上提出了著名的逻辑斯谛模型:
,其中
,r,K是常数,
表示初始时刻种群数量,r叫做种群的内秉增长率,K是环境容纳量.
可以近似刻画t时刻的种群数量.下面给出四条关于函数
的判断:
①如果
,那么存在
;
②如果
,那么对任意
;
③如果
,那么存在
在t点处的导数
;
④如果
,那么
的导函数
在
上存在最大值.
全部正确判断组成的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0258e2eee3b3aced0fccf7bf2f5a7e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ece3bf786bbeac646570f1a406e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ece3bf786bbeac646570f1a406e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e108b8fecde4ba66124709e92aeeb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e108b8fecde4ba66124709e92aeeb2d.png)
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6615283e5cd3420c7876a0db8f810dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ba751b23c41727bf0dc624b0df1674.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66ea216910348bd1e0fbf11bf8a8da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2ce55fe4f1711d88ce831826668641.png)
③如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66ea216910348bd1e0fbf11bf8a8da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3bb3ad142613a6cca7c0aef75e679c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0661d5771343bae8c083037a5267500e.png)
④如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a25c984f2b12c2a79db640fa308147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e108b8fecde4ba66124709e92aeeb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d87c01dc5d03297b653a48a5ca68de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1582e9d437ddf096b90257714a250a54.png)
全部正确判断组成的序号是
您最近一年使用:0次
名校
4 . ①回归分析中,相关指数
的值越大,说明残差平方和越大;
②对于相关系数
,
越接近1,相关程度越大,
越接近0,相关程度越小;
③有一组样本数据
得到的回归直线方程为
,那么直线
必经过点
;
④
是用来判断两个分类变量是否有关系的随机变量,只对于两个分类变量适合;
以上几种说法正确的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
②对于相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe9be2c6b3d8bf1e6ce9e9c0025ced7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe9be2c6b3d8bf1e6ce9e9c0025ced7.png)
③有一组样本数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafbe64ec9acf78f3624abbd06d516e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bcecfbd0e0b460f4e4ff6f654bd4608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bcecfbd0e0b460f4e4ff6f654bd4608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda105ec292aac7ab1485bd5031783fb.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2581192317ef233ccdccfc48ac29b52b.png)
以上几种说法正确的序号是
您最近一年使用:0次
2018-07-16更新
|
848次组卷
|
5卷引用:【全国校级联考】吉林省伊通满族自治县第三中学校等2017-2018学年高二下学期期末联考数学(文)试题
【全国校级联考】吉林省伊通满族自治县第三中学校等2017-2018学年高二下学期期末联考数学(文)试题【全国校级联考】吉林省伊通满族自治县第三中学校等2017-2018学年高二下学期期末联考数学(理)试题新疆乌鲁木齐市第十中学2018-2019学年高二下学期期末考试数学(文)试题吉林省长春市实验中学2019-2020学年高二下学期期中考试数学(理科)试题(已下线)第三章 统计案例【专项训练】-2020-2021学年高二数学(理)下学期期末专项复习(人教A版选修2-3)
5 . 给出下列四种说法:
(1)函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
与函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc4fbfbf459def913de664bc42535e7.png)
的定义域相同;
(2)函数
与
的值域相同;
(3)若函数
式定义在R上的偶函数且在
为减函数对于锐角
则
;
(4)若函数
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94345694d4215284c41f87146795ee.png)
,则
;
其中正确说法的序号是________ .
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b93abe2a497b7ef3cb8c1b9de8492e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc4fbfbf459def913de664bc42535e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b93abe2a497b7ef3cb8c1b9de8492e.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cf7675fc49cbdf3611ac547d85c8f7.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6ffa6fe2387ee19234c2ad0fcb92ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3398008d8cac937d9731037c906fcb3.png)
(4)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd199a3352b4c93de06ab7a22e18c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94345694d4215284c41f87146795ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5862c0c90cc629fb509d93e6ab1ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
其中正确说法的序号是
您最近一年使用:0次
解题方法
6 . 下列说法中,正确的有_______ .(写出所有正确说法的序号)
①在
中,若
,则
;
②在
中,若
,则
是锐角三角形;
③在
中,若
,则
;
④若
是等差数列,其前
项和为
,则三点
、
、
共线;
⑤等比数列
的前
项和为
,若对任意的
,点
均在函数
(
且
,
、
均为常数)的图象上,则
的值为
.
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336bbf462ae13b146976ef65a58a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe02d5a322e6f254bd8d51a5b346c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b925cbc2194a19c1830b9dd56cf1c4c5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3476fd22fa21beabbae9460e1406d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a906525d675d27085f1ceda8d9996ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564b9b7e76e0fc8685023137b0b7f7ba.png)
⑤等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f32693d25ece7f8e22c34a183537f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e058d98f8a257226d0fbcc941f72f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406185f4ad8bcd99e23adc8d289088ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
您最近一年使用:0次
2020-03-02更新
|
543次组卷
|
2卷引用:四川省蓉城名校联盟2018-2019学年高一下学期期中联考理数试题
7 . 定义全集
的子集
的特征函数
,这里
表示
在全集
中的补集,那么对于集合
、
,下列所有正确说法的序号是______ .
(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2193c95efaedd61ff49a7ff91df9e97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c093cbde3d3472d1f7f2b0dff2bc4881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38edfcbc6d0348a9fc75376f629909.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a11863d06650c0adafb18d2909336e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9035cc9d963cb84c8da6014a6e062f6b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6409ca7b7ab3c4aa4e0b9abc8d2cb066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749b06c4f14826c3b0a5b37e4356aa64.png)
您最近一年使用:0次
2020-02-23更新
|
1063次组卷
|
4卷引用:湖南省衡阳县创新实验班2019-2020学年高一上学期期末数学试题
湖南省衡阳县创新实验班2019-2020学年高一上学期期末数学试题重庆市万州二中教育集团2022-2023学年高一上学期第一次质量检测数学试题(已下线)高一上学期期中考试填空题压轴题50题专练-举一反三系列上海市七宝中学、松江一中、松江二中2024届高三上学期11月联考数学试题
8 . 有下列四个说法:
①已知向量
,
,若
与
的夹角为钝角,则
;
②先将函数
的图象上各点纵坐标不变,横坐标缩小为原来的
后,再将所得函数图象整体向左平移
个单位,可得函数
的图象;
③函数
有三个零点;
④函数
在
上单调递减,在
上单调递增.
其中正确的是__________ .(填上所有正确说法的序号)
①已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c44f4d7c3fb8ccc2e6eec4ceabb7c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86642b827fab670c8b786949352b6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2150cb0060a14e88e93c33cf456ae832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515b1e449cde902a74977b1fc3b31100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d1eec645764636c0e23b05e8f93234.png)
②先将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113083fbf1400914c80b7b679fa63f14.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9160787398bca0a5be565cd568943cf.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/580f05878939be94843299f5d1a462c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff17369a69a31422109bc7d7986b42c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4cc1a3c0e80ce294a3f8fefc0ca1e6.png)
其中正确的是
您最近一年使用:0次
9 . 已知函数
.①
的最小正周期为
;②
是奇函数;③
的一个对称中心为
;④
的最大值为
,最小值为
.上述说法正确的是__________ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf73988aa4d9961565ff07d136c13b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b3a91ccf6028608cd03df7072f6536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1113c6332e31f6642a73fc91ec34723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
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2019-12-13更新
|
374次组卷
|
2卷引用:贵州省毕节市实验高级中学2018-2019学年高一上学期期末数学试题
名校
10 . 下列说法正确的是_________ (请把你认为正确说法的序号都填上).
(1)函数
的最小正周期为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(2)若命题
:“
,使得
”,则
:“
,均有
”
(3)
中,
是
的充要条件;
(4)已知点N在
所在平面内,且
,则点N是
的重心;
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8639eae0325866c58acd33302151d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
(4)已知点N在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202f58538466612afcf186e5c65d9a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次