名校
解题方法
1 . 某单位为患病员工集体筛查新型流感病毒,需要去某医院检验血液是否为阳性,现有
份血液样本,有以下两种检验方案,方案一:逐份检验,则需要检验k次;方案二:混合检验,将k份血液样本分别取样混合在一起检验一次,若检验结果为阴性,则k份血液样本均为阴性,若检验结果为阳性,为了确定k份血液中的阳性血液样本,则对k份血液样本再逐一检验.逐份检验和混合检验中的每一次检验费用都是
元,且k份血液样本混合检验一次需要额外收
元的材料费和服务费.假设在接受检验的血液样本中,每份样本是否为阳性是相互独立的,且据统计每份血液样本是阳性的概率为
.
(1)若
份血液样本采用混合检验方案,需要检验的总次数为X,求X分布列及数学期望;
(2)①若
,以检验总费用为决策依据,试说明该单位选择方案二的合理性;
②若
,采用方案二总费用的数学期望低于方案一,求k的最大值.
参考数据:
,
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1111bfe3526b3555b2aa57fbdb48ff97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70444e3a66d1068038c5b5a77c7954aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bffe9674e4b3f9a4133112528adc07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee8937927d074628df8022fce45fd9f.png)
(2)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d51fe9d3fbd6229532570ff018a3cc.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb43f55430109bd9da649c8e4beb1a2.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8f8d3d05cc8ec8771e19c950b503f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56cd9fd1bf71d7bb19b29d9d326b73a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186edcab73f08a13fa491f884dbc13f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eca4bfa7b7b2105cf0e5e11d89e3707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3589d9db7fa446142fbcfe92a83a87ad.png)
您最近一年使用:0次
2020-08-14更新
|
2802次组卷
|
7卷引用:安徽省合肥市第一中学2020届高三下学期最后一卷数学(理)试题
安徽省合肥市第一中学2020届高三下学期最后一卷数学(理)试题河南省南阳市2020-2021学年高三上学期期末数学(理)试题(已下线)第51讲 概率与统计综合问题-2022年新高考数学二轮专题突破精练河北省部分重点中学2022届高三下学期期中数学试题(已下线)专题11-2 概率与分布列大题归类-1(已下线)模块十 计数原理与统计概率-2(已下线)专题9-1 概率与统计及分布列归类(理)(讲+练)-2
名校
解题方法
2 . 设数列
满足
,其中c为实数,数列
的前n项和是
,下列说法不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d49a6688994daabc49924716e6ad847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea49f8a2b98b542b1ebb2ac813346c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.c∈[0,1]是![]() | B.当c>1时,![]() |
C.当c<0时,不存在c使![]() | D.当![]() ![]() |
您最近一年使用:0次
2020-08-12更新
|
1506次组卷
|
2卷引用:浙江省2020届高三新高考模拟试题心态卷数学试题
名校
解题方法
3 . 对于正整数n,设
是关于x的方程
的实数根.记
,其中
表示不超过x的最大整数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
____________ ;设数列
的前n项和为
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469a49d15c634c79d8e36cb6edaff624.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2147cdb7c47327b9a8e3274df089aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c84fb3e536f74961243c6b89ddcee09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.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/469a49d15c634c79d8e36cb6edaff624.png)
您最近一年使用:0次
2020-08-12更新
|
1973次组卷
|
6卷引用:湖北省七市州教科研协作体2020届高三下学期5月联合考试数学(理)试题
名校
解题方法
4 . 已知函数
在区间
上有零点,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280ce7c871cfd3d905e186220ebcfb3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a203a88ad243937d825f3ac24dc1483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcce3547b95b36c32a247a5243c9a19.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-08-09更新
|
1702次组卷
|
9卷引用:2020届浙江省台州市温岭中学高三下学期3月模拟测试数学试题
2020届浙江省台州市温岭中学高三下学期3月模拟测试数学试题(已下线)专题4.4 导数的综合应用(精练)-2021年新高考数学一轮复习学与练(已下线)专题4.4 导数的综合应用(练)-2021年新高考数学一轮复习讲练测(已下线)考点09 导数的综合应用-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)重庆市南开中学2021届高三五模数学试题(已下线)考点17 函数与方程-备战2022年高考数学一轮复习考点一遍过(新高考地区专用)【学科网名师堂】(已下线)第7讲 主元法巧解双变量问题-2022年新高考数学二轮专题突破精练(已下线)2022年高考考前20天终极冲刺攻略(一)【理科数学】(5月18日)(已下线)专题2-3 导数压轴小题归类(讲+练)-2
名校
解题方法
5 . 在孟德尔遗传理论中,称遗传性状依赖的特定携带者为遗传因子,遗传因子总是成对出现,例如,豌豆携带这样一对遗传因子:
使之开红花,
使之开白花,两个因子的相互组合可以构成三种不同的遗传性状:
为开红花,
和
一样不加区分为开粉色花,
为开白色花,生物在繁衍后代的过程中,后代的每一对遗传因子都包含一个父本的遗传因子和一个母本的遗传因子,而因为生殖细胞是由分裂过程产生的,每一个上一代的遗传因子以
的概率传给下一代,而且各代的遗传过程都是相互独立的,可以把第
代的遗传设想为第
次试验的结果,每一次试验就如同抛一枚均匀的硬币,比如对具有性状
的父本来说,如果抛出正面就选择因子
,如果抛出反面就选择因子
,概率都是
,对母本也一样,父本、母本各自随机选择得到的遗传因子再配对形成子代的遗传性状,假设三种遗传性状
,
(或
),
在父本和母本中以同样的比例
出现,则在随机杂交试验中,遗传因子
被选中的概率是
,遗传因子
被选中的概率是
,称
、
分别为父本和母本中遗传因子
和
的频率,
实际上是父本和母本中两个遗传因子的个数之比,基于以上常识回答以下问题:
(1)如果植物的上代父本、母本的遗传性状都是
,后代遗传性状为
,
(或
),
的概率分别是多少?
(2)对某一植物,经过实验观察发现遗传性状
具有重大缺陷,可人工剔除,从而使得父本和母本中仅有遗传性状为
,
(或
)的个体,在进行第一代杂交实验时,假设遗传因子
被选中的概率为
,
被选中的概率为
,其中
、
为定值且
,求杂交所得子代的三种遗传性状
,
(或
),
所占的比例
,
,
;
(3)继续对(2)中的植物进行杂交实验,每次杂交前都需要剔除
的个体.假设得到的第
代总体中3种遗传性状
,
(或
),
所占的比例分别为:
,
,
,设第
代遗传因子
和
的频率分别为
和
,已知有以下公式
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2095339efed26ceec932ad2f9ef9e21c.png)
(ⅰ)证明
是等差数列;
(ⅱ)求
,
,
的通项公式,如果这种剔除某种遗传性状的随机杂交实验长期进行下去,会有什么现象发生?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac545c8032a4e7edbca671ded5a2e65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f72c3b3c76c6425af1dc19e294aef9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4929d6cf167d87aca3066dfe9e922a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b75fc182d81803f162afef21ca1ccd4.png)
(1)如果植物的上代父本、母本的遗传性状都是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
(2)对某一植物,经过实验观察发现遗传性状
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b70d4a3fc3e01b5a6358cf4e57578e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa55bc54cd6c2dc5ff0f125ac1a2ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44c235d8b49207ad3f2d77dc5d6cf20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3871a062c5e0a4e009b01aa47afb48.png)
(3)继续对(2)中的植物进行杂交实验,每次杂交前都需要剔除
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306ac9722099868f11c37067a24f3892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25893a9dc7878e82704f1eca13cd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fa77d305db1c083465d3895d45dc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5604a87a7559957790a4256fdb9ae1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cff9404d1a61595ff7681ec385b8d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa08e0ffe553c48c67d37cda26b46a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b19ea7c42030ea26e1b702932e614aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce603aa3abcb61750d2191aaa13dddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bcd21db3c870bff7037735313648c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fe1b3406b91579c3d4576fd309bdf3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2095339efed26ceec932ad2f9ef9e21c.png)
(ⅰ)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28a32aa53105ca3944205fbf56ec5ea.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd4033c8a46a2a5645a7b5016308a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15dab5ad72b1d9b9b918bf40ae3bf4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49064344f88c55bb70e4b5ebaa33855.png)
您最近一年使用:0次
解题方法
6 . 已知数列
满足:对任意的
,若
,则
,且
,设集合
,集合A中元素最小值记为
,集合A中元素最大值记为
,如数列:
时,
,
,
.
(1)已知数列:
,写出集合
及
;
(2)求证:不存在
,
(3)求
的最大值以及
的最小值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ef0673c05c861c77e1fee2855faab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28295bd08b38736ffc7566ad83b4d792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b71af6590f0f369c164a054a8b63bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a205f096c854a2f7cd71255056f9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69836a99a93afdee1fed09226971a83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d4cd8bc0d5fb4b4fc5e7559c723838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d73af9d153be28fe8f78cfa37f243a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d06cb03804abed6015be7b8c2eaf83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08456253ac79029738533a5bb06c7e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02dc0213102379e6937b3074b8ad04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9f8f70909440775d8e9d3974f7881b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ec4f4a7252a81dbcb4144f68948b7a.png)
(1)已知数列:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6abd467e73d2edd6226c73f0d6edf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d73af9d153be28fe8f78cfa37f243a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d06cb03804abed6015be7b8c2eaf83f.png)
(2)求证:不存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c256c7667cbd6559d5b80051b62d28c9.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d73af9d153be28fe8f78cfa37f243a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d06cb03804abed6015be7b8c2eaf83f.png)
您最近一年使用:0次
7 . 设椭圆
,直线
,O为坐标原点.
(1)设点
在C上,且C的焦距为2,求C的方程;
(2)设l的一个方向向量为
,且l与(1)中的椭圆C交于A.B两点,求证:
为常数;
(3)设直线l与椭圆C交于A.B两点,是否存在常数k,使得
的值也为常数?若存在,求出k的表达式及
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b67a4ee15887600fd69042a46e8514.png)
(1)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d0dec81cf9f49aaa0296828466a820.png)
(2)设l的一个方向向量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2fc66af1e6967e988c9670ca8ceeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cef5ef7440bb1fbb671f9c2a955497.png)
(3)设直线l与椭圆C交于A.B两点,是否存在常数k,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cef5ef7440bb1fbb671f9c2a955497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cef5ef7440bb1fbb671f9c2a955497.png)
您最近一年使用:0次
8 . 若无穷数列
和无穷数列
满足:存在正常数A,使得对任意的
,均有
,则称数列
与
具有关系
.
(1)设无穷数列
和
均是等差数列,且
,
,问:数列
与
是否具有关系
?说明理由;
(2)设无穷数列
是首项为1,公比为
的等比数列,
,
,证明:数列
与
具有关系
,并求A的最小值;
(3)设无穷数列
是首项为1,公差为
的等差数列,无穷数列
是首项为2,公比为
的等比数列,试求数列
与
具有关系
的充要条件.
![](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/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd9630eef5312838c202cf054e9ee7e.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/27b6f8cb2faaad82b53b2a66ee817a37.png)
(1)设无穷数列
![](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/9260f8989cfd0ffca5a49ffbc0668f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e67d6abc5e1ab4c45046d1ee37e328.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/2387880727d458702651d699e76d7d76.png)
(2)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2525f733e43b3a4558b83f10f20425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.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/27b6f8cb2faaad82b53b2a66ee817a37.png)
(3)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d928d897331d22ce7a2d230ed7138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e116f14c30b56ba916164b2da784b4e.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/27b6f8cb2faaad82b53b2a66ee817a37.png)
您最近一年使用:0次
2020-08-04更新
|
715次组卷
|
4卷引用:江苏省南京师范大附中2020届高三下学期6月高考模拟(1)数学试题
江苏省南京师范大附中2020届高三下学期6月高考模拟(1)数学试题上海市青浦区2021届高三上学期一模(期终学业质量调研)数学试题上海市青浦区2021届高三上学期一模数学试题(已下线)上海高二下学期期末真题精选(压轴60题35个考点专练)-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
解题方法
9 . 如图,在平面直角坐标系xOy中,已知椭圆
的离心率为
,右准线的方程为
,A为椭圆C的左顶点,
、
分别为椭圆C的左,右焦点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3d3647b2-b4ff-4336-9154-b6e399e2ae64.png?resizew=184)
(1)求椭圆C的标准方程;
(2)过点
作斜率为
的直线l交椭圆C于M,N两点(点M在点N的左侧),且
.若
,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3d3647b2-b4ff-4336-9154-b6e399e2ae64.png?resizew=184)
(1)求椭圆C的标准方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b992637e995fc7613460d38267b816a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9700ce79eeb1fa4503dbf3c6cc36e79b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6e884a6299a50a89ef79d572a9f0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282e56c0dfb14ebd97b83296ea57eb7d.png)
您最近一年使用:0次
10 . 设函数
,
,
,取
,
,
,
,则
,
,
的大小关系为________ .(用“
”连接)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04e15196ce905f578e53b845242ee30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425c67c8c78ed8a09410355fe08ee85f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e9f76dd74f65d74b6a522b1acc0018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c86e97e1722aaab102d235f1c186d6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e9b154373fdb7bafed8e99120b34aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891da4e5f3af604390021d43b5c3fd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90de8c0588e022b64be34e79244a1889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
您最近一年使用:0次
2020-08-03更新
|
2043次组卷
|
2卷引用:江苏省南通市2020届高三下学期高考考前模拟卷(五)数学试题