名校
解题方法
1 . 已知函数
.
(1)求函数
的最值;
(2)若
,设曲线
与
轴正半轴的交点为
,该曲线在点
处的切线方程为
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd14ea273c21800c00132219688c61c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c28eea59d06bd471fb15d2111014817.png)
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解题方法
2 . 记
的内角
的对边分别为
,若
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaecbe2cfa3762326d44acd01ad1850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 已知函数
,若存在
使得
,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd2c7b8627bd16e0fc05cfff8ae880d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6440574a832dc3d79d8172b07bc5fc6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 复数
满足
(
为虚数单位),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa63536f51438bae1a5c3d6d2bd2d01.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28af485f85c1e339ef72d40911f32ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa63536f51438bae1a5c3d6d2bd2d01.png)
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名校
解题方法
5 . 为了选拔雏鹰计划的预备人员,某地区教育局对高一年级新生进行了测试(测试分为初试和复试).现共有400名学生参加初试,且所有学生的初试成绩
近似服从正态分布
,根据以往入选同学的初试和复试成绩走势,本届复试作出如下规定:①初试成绩高于91分者免于复试,直接确定为雏鹰计划的预备人员;②初试成绩高于80分且不超过91分的学生有资格参加复试,下图为从以往入围雏鹰计划预备人员的所有同学中随机抽取的20名同学的的初试和复试成绩.
(2)复试试题由两道数学题和两道物理题构成,已知数学题的难度系数为0.5(可以理解为进入复试的学生答对每道数学题目的概率是0.5),物理题目的难度系数均为
,能否答对这些题目相互独立,每个考生需答完四个题目,至少答出其中三个即通过复试并确定为雏鹰计划的预备人员,如果本次确定为雏鹰计划的预备人员数目不能超过33人,请确定物理试题的难度系数
的取值范围.
附:若随机变量
服从正态分布
,则
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0210a70d3664db67006ecd0cbc88e864.png)
(2)复试试题由两道数学题和两道物理题构成,已知数学题的难度系数为0.5(可以理解为进入复试的学生答对每道数学题目的概率是0.5),物理题目的难度系数均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
附:若随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfc26b8bdcd1fd3781c4593217c725e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04398619f7b3251b93fb34cc14930f8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14360db70f4872cf5b47f12090fc211b.png)
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6 . 在平面直角坐标系
中,已知圆
,
为直线
上的一个动点,过点
作圆
的切线
,切点为点
,当
最小时,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab468a0448699f70470931b66a6cfcb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5e8941e3662b226d03275ca433f478.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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d341082cc54b1cb7a790af9ec4a365d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d6a7903e022d881f644be192898e35.png)
A.4 | B.![]() | C.2 | D.3 |
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7 . 在
中,若
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54028f07f1e039fc140aac0d6c3bf86a.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
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解题方法
8 . 已知
分别是椭圆
的左右焦点,如图,抛物线
的焦点为
,且与椭圆在第二象限交于点
,延长
与椭圆交于点
.
(2)设
和
的面积分别为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafb6a097a0aa621b58c2b54acdc5984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098f0e8865195f8fbabbc9ee1ae556bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cb8d7d091a188a6b311bb4e6c85ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104c7ac4a841a2a7bd3e39d2b3fb03ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f857a838fca8a051426984c8bcf5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4085b194990fc17f8073878b8eca1a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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9 . 进位制是人们为了计数和计算方便而约定的记数方式,通常“满二进一,就是二进制;满八进一,就是八进制;满十进一,就是十进制……;满几进一,就是几进制”.
我们研究的正整数通常是十进制的数,因此,将正整数
的各位上的数字分别记为
,则
表示为关于10的
次多项式,即
,其中
,
,记为
,简记为
.
随着计算机的蓬勃发展,表示整数除了运用十进制外,还常常运用二进制、八进制等等.更一般地,我们可类似给出
进制数定义.
进制数的定义:给出一个正整数
,可将任意一个正整数
,其各位上的数字分别记为
,则
唯一表示为下列形式:
,其中
,
,并简记为
.
进而,给出一个正整数
,可将小数
表示为下列形式:
,其中
,
,并简记为
.
(1)设
在三进制数下可以表示为
,
在十进制数下可以表示为
,试分别将
转化成十进制数,
转化成二进制数;
(2)已知数列
的前
项和为
,且满足
,
,数列
满足,当
时,
;
①当
时,求数列
的通项公式;
②证明:当
时,
.
我们研究的正整数通常是十进制的数,因此,将正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dd0a10a73674c8a47420d7e91da0cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432851e0d0b7a2924da29b9cc5ca1706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c95c671f517c02f1deccd2174f7465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f856d17cdd7499eeea956845fe51ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ceec6993cc9e39a5d5e6097d6447c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d5a7b02c9d7bd9e2910849ab591fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856f717993779ce676195ed3c8074e15.png)
随着计算机的蓬勃发展,表示整数除了运用十进制外,还常常运用二进制、八进制等等.更一般地,我们可类似给出
![](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/50e3273deabbf8c7d700d340b71ca2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c89fe2197a7044536c5c3b52789636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f285903ef04eb7a1d2071cb7197521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22a19eeff39dff098ea766cf74d3c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d2aae1ce527125960613e78e1bb501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2a4ce3547aff6aebdd145d11c566fe.png)
进而,给出一个正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e3273deabbf8c7d700d340b71ca2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20277d6743703a3710d6ceb8dc869cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ef1766237596595c550af4600c370e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e6d4140fcd9583fe03f91701ae083f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74304131e01d0e9e68bd8a566b30d529.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99dc317d03cfed7687fad0448c298f9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d9abc918557b3bd56cb30dfd20b91f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/fb451756eab7b736e0c576e03f6243b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b93e6ee1145e185621ae08dbf170f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26663935b7cb86ca81ad2aa73d49e26a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b93e6ee1145e185621ae08dbf170f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
②证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931b93e6ee1145e185621ae08dbf170f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac363332016ae0fa59a5e4a1d41e2a0b.png)
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10 . 已知圆锥的轴截面为正三角形,该圆锥的侧面积数值与其体积数值相等,则该圆锥的底面积为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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