1 . 已知椭圆
的左、右顶点分别为
、
,且椭圆
经过点
.
(1)求
的值,并求经过点
且与圆
相切的直线方程;
(2)设
为椭圆
上的一个异于
、
的动点,直线
、
分别与直线
相交于
、
两点,求
的最小值:
(3)已知椭圆
上有不同的两点
、
,且直线
不与坐标轴垂直,设直线
、
的斜率分别为
、
,求证:“
”是“直线
经过定点
”的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f1e4548f62c6e3f124656c76ee64d0.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/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16dcb66cd0d298f31f4f9c7e3a5fdcb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.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/a6da2235c42867f9a79007c3fc83fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3bd41676f6b69acac00a292fe134cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d87446c9ef0230285d9b08127fce5c.png)
(3)已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66de27301ae08a4154ed37bb4a261b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32d26c8d44f5fb4813a19c1030a9f5.png)
您最近一年使用:0次
名校
解题方法
2 . 已知数列
的前n项和
满足
,
.
(1)求
的通项公式;
(2)若
表示不超过x的最大整数,如
,求
的值;
(3)设
,
,问是否存在正整数m,使得对任意正整数n均有
恒成立?若存在,求出m的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5211cd2b4ebcdaad8d73cf999b275475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3406792cf683de07aa4371168ad65226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa192e136584c2abab136070a430b9e1.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0ea9bbe51ee5a78c22ad18807ecf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae9df8b3c69acd594e155714263335a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0b71732f5f5fb0f70fbccc918948608.png)
您最近一年使用:0次
解题方法
3 . 设
是一个无穷数列
的前
项和,若一个数列满足对任意的正整数
,不等式
恒成立,则称数列
为和谐数列.关于命题:①若等差数列
为和谐数列,则
一定存在最小值;②若
的首项小于零,则一定存在公比为负数的一个等比数列为和谐数列.下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edefd533852c96d0d8047c859d4bc458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.①和②都为真命题 | B.①和②都为假命题 |
C.①为真命题,②为假命题 | D.①为假命题,②为真命题 |
您最近一年使用:0次
解题方法
4 . 设
.
(1)若
,求函数
的图象在
处的切线方程;
(2)若
在
上恒成立,求实数
的取值范围;
(3)若函数
存在两个极值点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab44240a0cb09a1b9f5966c63fa290f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae386699086599e0bcb0fbe59cffd9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd785bc48778543268feeca30728c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
您最近一年使用:0次
5 . 已知
,函数
,其中
.
(1)若
,
,写出函数
图像的一条水平切线的方程;
(2)若
,
,且满足
,证明:
;
(3)若存在
,使得函数
有唯一零点,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7569cd7e9b31ad838230133b9bc8314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34e050fbca6ba0d5390263131690a41.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7562f4853fe96f2054d3f03e4eb207b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73feb6b2d30ca5becd5711582d6ba008.png)
(3)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcb5d3be7955ac79a959abad606a47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
您最近一年使用:0次
6 . 如图,已知椭圆
的方程为
,点
、
分别是椭圆
的左、右顶点,点
的坐标是
,过点
的动直线
交椭圆
于点
、
(点
的横坐标小于点
的横坐标).
焦点的坐标;
(2)是否存在常数
,使
为定值,若存在,求出
的值;若不存在,请说明理由.
(3)当设直线
的斜率不为
时,设直线
与
交于点
.请提出一个与点
有关的问题,并求解该问题.
(备注:本小题将根据提出问题的质量及其解答情况进行分层计分.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfa2a6d9749a619edf80bad8b3e4962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45336b55d682027bdd4c2ce103287c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)当设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(备注:本小题将根据提出问题的质量及其解答情况进行分层计分.)
您最近一年使用:0次
解题方法
7 . 设函数
的图象由方程
确定,对于函数
给出下列命题:
①对于任意的
,恒有
成立;
②函数
的图象上存在一点
,使得 P到原点的距离小于
;
③对于任意的
,
恒成立;以上命题中,真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5947af41ec4a359679d934a135e53434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
①对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0f49df60c32911343a22ecd6acf0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a57d6d7b74ae630e6ce3b43afe6060.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
③对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ecca5fdf54f1057e4312844b7e1e6.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
解题方法
8 . 已知集合
(其中
是虚数单位)
,定义:
,
.
(1)计算
的值;
(2)记
,若
,且满足
,求
的最大值,并写出一组符合题意的
、
;
(3)若
,且满足
,
,记
,求证:当
时,函数
必存在唯一的零点
,且当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531f55c9de4647282bc0424a81f4fd25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ddb621d78a738eba6ebafecbbd7d06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47aa3fcf666d1169ceca5e1e720b926e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ccc73232efc9d641adcbae21035944.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0ff8b406a295a58f4fbb36b4c292fa.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be674fcbd2fd1a608fd4a9705c70db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e7c6170cd75c5a40d7e695eda15e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e95d018246b699601d127e79ec46131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f82089a3186fdffaa2535faebd3d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b54286fe72b8305272c36c0a3a8d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f7d480cfc89b872404666083e62db7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546ababc482b51df95c4aba05ee18c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d828db2a08e2a1da164a0012cc6627a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661249bf6499017f9e5e03db3fcd93d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d5ec74c81f7d02f273f7eecefaf9a7.png)
您最近一年使用:0次
解题方法
9 .
中,
,当
时,
的最小值为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6060d9a82ed5405a1ea8cd824448b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3ede869e508a8c8bda34a16782f863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9baf78638bf6a9798800efc59248d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c54fccc669a643c76daccc13562e265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
您最近一年使用:0次
10 . 在2023年杭州亚运会最后两个竞技项目男女马拉松比赛中,中国选手何杰以2小时13分02秒夺得男子组冠军,这是中国队亚运史上首枚男子马拉松金牌.人类长跑运动一般分为两个阶段,第一阶段为前1小时的稳定阶段,第二阶段为疲劳阶段.小明想通过数学建模的方式研究运动员的运动时长与其剩余体力的关系.通过查找资料,小明得知:一位60kg的复健马拉松运动员进行4小时长跑训练,稳定阶段平均速度为30km/h,该阶段每千克体重消耗体力
(
表示该阶段所用时间),疲劳阶段由于体力消耗过大,在原有基础上随时间变大,速度降低,比例系数为
.同时,疲劳阶段速度降低,体力得到一定恢复,该阶段每千克体重消耗体力
,(
表示该阶段所用时间).同时,根据比赛现场的环境,其他运动员的平均配速,以及比赛策略等各方面因素,产生上下5%~10%的速度浮动,其对于运动员的体力影响也更为复杂.已知该运动员初始体力为
,请帮助小明补充完善数学建模的过程:
(1)对于数学建模,我们需要给出合理假设.
假设一:假设该运动员稳定阶段作速度为
的匀速运动;疲劳阶段做
的减速运动
假设二:_________________
(2)提出问题一:该运动员剩余体力Q关于时间t有何关系?请写出函数
;
提出问题二:该运动员在4小时内何时体力达到最低值,最低值为多少?
(3)总结运用:请根据以上计算结论,给出一定的实际建议.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f0ede408390464cffb0308ce938f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff35e4e3cdc188643c46265591575c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166636b1f3567f864d7321534afed858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71dba305f8b63d590f0233275eaa3f10.png)
(1)对于数学建模,我们需要给出合理假设.
假设一:假设该运动员稳定阶段作速度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ee1c3f44dc7187d75effa7133fa678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f7cb632d784a4c00b291cadab83f8d.png)
假设二:_________________
(2)提出问题一:该运动员剩余体力Q关于时间t有何关系?请写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2feeb7462a45a01b9b9530248604063e.png)
提出问题二:该运动员在4小时内何时体力达到最低值,最低值为多少?
(3)总结运用:请根据以上计算结论,给出一定的实际建议.
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