名校
解题方法
1 . 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
2 . 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
3 . 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
名校
解题方法
4 . 在平面直角坐标系中,点
满足方程
.
(1)求点
的轨迹
的方程;
(2)作曲线
关于
轴对称的曲线,记为
,在曲线
上任取一点
,过点
作曲线
的切线
,若切线
与曲线
交于
、
两点,过点
、
分别作曲线
的切线
、
,证明:
、
的交点必在曲线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a472119eb2957d6e3309b2adad14a9a3.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)作曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2020-08-06更新
|
456次组卷
|
7卷引用:2020届河北省衡水中学全国高三期末大联考文数试卷
2020届河北省衡水中学全国高三期末大联考文数试卷2020届高三2月第01期(考点08)(文科)-《新题速递·数学》广西南宁市第三中学2019-2020学年高三期末大联考文科数学试题(已下线)专题05 平面解析几何——2020年高考真题和模拟题文科数学分项汇编湖北省恩施州2022届高三上学期期末文科数学试题(已下线)专题18 押全国卷(文科)第21题 圆锥曲线(已下线)专题18 圆锥曲线高频压轴解答题(16大核心考点)(讲义)-1
5 . 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
6 . 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
7 . 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
名校
解题方法
8 . 已知
为定义在
上的奇函数,且当
时,
取最大值为1.
(1)写出
的解析式.
(2)若
,
,求证
(ⅰ)
;
(ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886d2d7da83c74826a757bffc10183a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195fc747e2fc50cb6df2c844d51e4d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc85a01f2a5b003d545aabd58658f430.png)
(ⅰ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935d2dec00d5584f549d9135df57d4ff.png)
(ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89c48120fe5326e9b1c718d948816d0.png)
您最近一年使用:0次
名校
解题方法
9 . 新型冠状病毒是一种人传人,而且隐藏至深、不易被人们直觉发现危及人们生命的严重病毒.我们把与这种身带新型冠状病毒(称之为患者)有过密切接触的人群称为密切关联者.已知每位密切关联者通过核酸检测被确诊为阳性后的概率为
.一旦被确诊为阳性后即将其隔离.某位患者在隔离之前,每天有
位密切关联者与之接触(而这
个人不与其他患者接触),其中被感染的人数为
.
(1)求一天内被感染人数
的概率
的表达式和
的数学期望;
(2)该病毒在进入人体后有14天的潜伏期,在这14天内患者无任何症状,则为病毒传播的最佳时间.设每位患者在不知自己患病的情况下的第二天又与
位密切关联者接触.从某一名患者被带新型冠状病毒的第1天开始算起,第
天新增患者的数学期望记为
.
①当
,
,求
的值;
②试分析每位密切关联者佩戴口罩后与患者接触能否降低患病的概率,经大量临床数据验证佩戴口罩后被感染患病的概率
满足关系式
.当
取得最大值时,计算
所对应的
和
所对应的
值,然后根据计算结果说明佩戴口罩的必要性(取
).
(参考数据:
,
,
,
,
,
计算结果保留整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8eadad8a8e5499833402309d9cba4fe.png)
(1)求一天内被感染人数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7713e92137d607d9a85d3333d8ddf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)该病毒在进入人体后有14天的潜伏期,在这14天内患者无任何症状,则为病毒传播的最佳时间.设每位患者在不知自己患病的情况下的第二天又与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b9f1a66ffe7d303510678a069a52b3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6226b263d7eaae99b449dd56410e841f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c2fb1c429eedede140ce3582effef1.png)
②试分析每位密切关联者佩戴口罩后与患者接触能否降低患病的概率,经大量临床数据验证佩戴口罩后被感染患病的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a886d45a46bdde67115c5911cb85ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f82e57c5fa346d58e7c4fdbfea39f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a886d45a46bdde67115c5911cb85ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a886d45a46bdde67115c5911cb85ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a4303241972c4400ece8d34f0dde18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cb085178d2c970a15469d66b5d683d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6226b263d7eaae99b449dd56410e841f.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12a76edbb3e98e3ff41c03401769d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50101047632b94dcd5cf8035b093cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e36492ded42e594c63855802dee601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b3de587321151ba08b37be46802f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b268904aaa426d3741aab972a87082f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2228b549150de6c9b303bc010b8d3118.png)
您最近一年使用:0次
2020-07-29更新
|
4274次组卷
|
7卷引用:2020年全国普通高等学校统一招生考试试验检测卷1数学(理科)试题
2020年全国普通高等学校统一招生考试试验检测卷1数学(理科)试题江苏省如东中学、姜堰中学、沭阳中学三校2022届高三下学期4月阶段性测试数学试题(已下线)专题17 概率与统计的创新题型(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宁夏回族自治区银川一中2023-2024学年高二下学期期中考试数学试题
2020高三·全国·专题练习
解题方法
10 . 设
是偶函数,且当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6ac222096d0739acfff863a9d7d709.png)
(1)当
时,求
的解析式;
(2)设函数
在区间
上的最大值为
,试求
的表达式;
(3)若方程
有四个不同的实根,且它们成等差数列,试探求
与
满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6ac222096d0739acfff863a9d7d709.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726c255e5f5ed80378bcbe5b9913a6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
(3)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次