名校
解题方法
1 . 已知椭圆
,长轴长为4,
分别为椭圆的左焦点、右焦点,椭圆上一点
满足
垂直于
轴,且
.
(1)求椭圆
的标准方程;
(2)已知点
为该椭圆的左顶点,若斜率为
且不经过点
的直线
与椭圆
交于
两点,且点
在以线段
为直径的圆上,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e9a9aaa49dee8866983f5e087da103.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
2 . 生态学研究发现:当种群数量较少时,种群数量近似呈指数增长;而当种群数量达到某个值后,增长率就会随种群数量的增加而逐渐减小,逻辑斯谛模型
(
,
,
均为正数)可以用来刻画这种现象,其中
是初始时刻种群数量,
是种群的内秉增长率,
是环境容纳量,
表示时刻
的种群数量.下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aba7839e1f30ac652b11c8b9534bea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af670ebba51f5af6b6055af1f62f5f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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解题方法
3 . 在
平面上有一系列点
,对每个正整数
,点
位于函数
的图象上,以点
为圆心的
都与
轴相切,且
与
外切.若
,且
的前
项之和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc625e19e7ca2b9d097f67a3d472e47.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1552c675b51d9d69cd32e061f8420bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593f58c07b92d80b65f71e91b9991c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b572c2c8262bb7bf6a8c9cdf1ebead22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b572c2c8262bb7bf6a8c9cdf1ebead22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83258693b38108f4899207752b2e38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f213202ccda6d7e6dcf21611e81c7b3.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/3bc625e19e7ca2b9d097f67a3d472e47.png)
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2024-01-02更新
|
380次组卷
|
2卷引用:福建省泉州市实验中学2023-2024学年高二上学期12月月考数学试题
名校
4 . “双11”期间,某商场进行如下的优惠促销活动:
优惠方案1:一次购买商品的价格,每满60元立减5元;
优惠方案2:在优惠1之后,再每满400元立减40元.
例如,一次购买商品的价格为150元,则实际支付额
=140元,其中[x]表示不大于x的最大整数.又如,一次购买商品的价格为810元,则实际支付额
13
40=705元.
(1)小芳计划在该商场购买两件价格分别是250元和650元的商品,她是分两次支付好,还是一次支付好?请说明理由;
(2)已知某商品是小芳常用必需品,其价格为30元/件,小芳趁商场促销,想多购买几件该商品,其预算不超过500元,试求她应购买多少件该商品,才能使其平均价格最低?最低平均价格是多少?
优惠方案1:一次购买商品的价格,每满60元立减5元;
优惠方案2:在优惠1之后,再每满400元立减40元.
例如,一次购买商品的价格为150元,则实际支付额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4174fe812bebfe2876316c0588aa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdfdbf284e8cc6975803d0f62b95c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b700fa9aeb1016aa71f76e4b6bb212e.png)
(1)小芳计划在该商场购买两件价格分别是250元和650元的商品,她是分两次支付好,还是一次支付好?请说明理由;
(2)已知某商品是小芳常用必需品,其价格为30元/件,小芳趁商场促销,想多购买几件该商品,其预算不超过500元,试求她应购买多少件该商品,才能使其平均价格最低?最低平均价格是多少?
您最近一年使用:0次
2023-12-20更新
|
283次组卷
|
3卷引用:福建省“德化一中、永安一中、漳平一中”三校协作2023-2024学年高一上学期12月联考数学试题
名校
5 . 已知函数
的定义域是
,对
,都有
,且当
时,
,且
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6571b33b56c6cd88f2f6e091031bcf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1947266214c98cfdeea15425a47de17.png)
A.![]() |
B.函数![]() ![]() |
C.![]() |
D.满足不等式![]() ![]() ![]() |
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6 . 设函数
,若关于
的函数
恰好有四个零点,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1a8728d95a0d006733d322e8e49050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57710a106ac9afe871630671facd1980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
7 . 已知数列
的前
项和
,数列
是首项和公比均为2的等比数列,将数列
和
中的项按照从小到大的顺序排列构成新的数列
,则( )
![](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/4300dca231e2f4b37f70900b33439d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
A.![]() | B.数列![]() ![]() ![]() ![]() |
C.![]() | D.![]() |
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2023-12-17更新
|
662次组卷
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3卷引用:福建省泉州市实验中学2023-2024学年高二上学期12月月考数学试题
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8 . 已知
是椭圆
的左右顶点,
是双曲线
在第一象限上的一点,直线
分别交椭圆于另外的点
.若直线
过椭圆的右焦点
,且
,则椭圆的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b3ebb0c18ca94b7728f3e965859082.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-12-17更新
|
263次组卷
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2卷引用:福建省泉州市实验中学2023-2024学年高二上学期12月月考数学试题
9 . 如图,
内接于
,
是
的内心,过
作
的垂线交
于点
,交
于点
,
是
的中点,连接
,过
作
于点
.证明:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/11efadd2-347e-4564-b671-6a3379f99d81.png?resizew=148)
(1)
;
(2)
、
、
、
四点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb882b525043fb4602f598a9dfe5fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42774a918f52ac8aa8b1f5b78a676f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da701094ca9f9687f4b5af1825773a96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a37f6963eefab01bd11be38cdbe0b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/11efadd2-347e-4564-b671-6a3379f99d81.png?resizew=148)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8174382753c87fee237ccf0a5f32551.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解题方法
10 . 有2024个半径均为1的球密布在正四面体
内(相邻两球外切,且边上的球与正四面体的面相切),则此正四面体的外接球半径为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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