(Ⅰ)若.求函數(shù)的極值, 查看更多

 

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(本題13分)已知函數(shù)

(1)已知一直線經(jīng)過原點(diǎn)且與曲線相切,求的直線方程;

(2)若關(guān)于的方程有兩個(gè)不等的實(shí)根,求實(shí)數(shù)的取值范圍。

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已知命題“若函數(shù)是增函數(shù),則”,則下列結(jié)論正確的是

A.否命題是“若函數(shù)是減函數(shù),則”,是真命題

B. 逆命題是“若,則函數(shù)是增函數(shù)”, 是假命題

C. 逆否命題是“若,則函數(shù)是減函數(shù)”, 是真命題

D. 逆否命題是“若,則函數(shù)不是增函數(shù)”, 是真命題

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(本題14分)設(shè)

(1)當(dāng)時(shí),求處的切線方程;

(2)當(dāng)時(shí),求的極值;

(3)當(dāng)時(shí),求的最小值。

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閱讀下列應(yīng)用文及相關(guān)信息,并按照要求匹配信息。請?jiān)诖痤}卡上將對應(yīng)題號的相應(yīng)選項(xiàng)字母涂黑。
下面是一篇有關(guān)書籍介紹的應(yīng)用文,請閱讀下列應(yīng)用文和相關(guān)信息,并按照要求匹配信息。
首先請閱讀下列應(yīng)用文:
A
I Am a Pencil
Sam Swope's job was teaching writing to third-graders in New York City. His students were from 21 countries, speaking 11 languages, with different backgrounds. But there were a few things they had in common. Family troubles, for one. Money struggles. And poetry. Every single student, with the help of this creative teacher, came forth with awesome writing. Swope leaves the reader with the inspiring conviction (堅(jiān)信) that deep within each of us lives a poet.
B
Between a Rock and a Hard Place
Aron Ralston, 28, went hiking in a remote Utah canyon without telling anyone. An unexpected catastrophe struck. With enough supplies only for a day, Ralston knew his situation was full of danger. Sure enough, after five days he was in a fight against death. That was when he carried out a courageous plan - using a pocket knife to cut off his trapped arm. His amazing survival story rests at a place among the classics of the genre (體裁).
C
Our Brother's Keeper
Author Jedwin Smith spent 30 years trying to repress (克制) all memories of his brother, Jeff, who was killed in Vietnam. But in Our Brother's Keeper he tells what happens when the Internet brings him into contact with several of his brother's old Marine friends, including the guy who held Jeff in his arms as he died. First via e-mail, and then in person, Smith gets to know these men.
D
The All Americans
With his graduation from West Point, Henry Romanek sailed toward Omaha Beach on the eve of Dday. It was June 1944, and he was about to face the bloodiest battle of his life. Just yesterday, it seemed, he was a standout soldier on the Army team. Now, he was a leader of youngsters in battle, fighting, quite literally, for his country and the future of the free world. In this book, Lars Anderson retraces Romanek's life and that of three other soldiers.
E
Copies in Seconds
With the push of a button, anyone can make copies of almost anything - unlike the old days, when papers had to be rewritten long-hand, carbon-copied out of fussy mimeograph machines (蠟紙油印機(jī)). In Copies in Seconds, David Owen showed how a shy engineer named Chester Carlson perfected his xerography machine (靜電復(fù)印機(jī)) and shopped it around until finally hooking up with the Haloid Corporation. That partnership led to the Xerox copier and changed the face of work forever.
F
State of Grace
Back in the late 1950s and early 1960s, the Lynvets was just a football team in a sandy New York City neighborhood. But to most of its members - the author, Robert Timberg, included - the team was their only experience of a happy family, their only chance to rise above terrible everyday circumstances, their only shot at being heroes. The friendships these men formed sustained (維持) them throughout their lives.
請閱讀以下求書者的信息,然后匹配他們所要尋找的書籍:
1. Tom is looking for a book about the hiking stories to help him in his following outdoor activities.
2. Kate wants to find a book about the stories of the soldiers during World War II.   .
3. Mark wants to research into the history of technological development.
4. Jack is researching into education in a college. He is especially interested in the teaching methods. He wants to find a book which can tell him something about how to teach students from different backgrounds.
5. John wants to find some materials about the soldiers in Vietnam War to carry on his new research.
求書者                          書籍
【小題1】 Tom                  A. I Am a Pencil
【小題2】 Kate                  B. Between a Rock and a Hard Place    
【小題3】 Mark                   C. Our Brother's Keeper
【小題4】Jack                   D. The All Americans
【小題5】 John                   E. Copies in Seconds
F. State of Grace

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閱讀下列應(yīng)用文及相關(guān)信息,并按照要求匹配信息。請?jiān)诖痤}卡上將對應(yīng)題號的相應(yīng)選項(xiàng)字母涂黑。

下面是一篇有關(guān)書籍介紹的應(yīng)用文,請閱讀下列應(yīng)用文和相關(guān)信息,并按照要求匹配信息。

首先請閱讀下列應(yīng)用文:

A

I Am a Pencil

Sam Swope's job was teaching writing to third-graders in New York City. His students were from 21 countries, speaking 11 languages, with different backgrounds. But there were a few things they had in common. Family troubles, for one. Money struggles. And poetry. Every single student, with the help of this creative teacher, came forth with awesome writing. Swope leaves the reader with the inspiring conviction (堅(jiān)信) that deep within each of us lives a poet.

B

Between a Rock and a Hard Place

Aron Ralston, 28, went hiking in a remote Utah canyon without telling anyone. An unexpected catastrophe struck. With enough supplies only for a day, Ralston knew his situation was full of danger. Sure enough, after five days he was in a fight against death. That was when he carried out a courageous plan - using a pocket knife to cut off his trapped arm. His amazing survival story rests at a place among the classics of the genre (體裁).

C

Our Brother's Keeper

Author Jedwin Smith spent 30 years trying to repress (克制) all memories of his brother, Jeff, who was killed in Vietnam. But in Our Brother's Keeper he tells what happens when the Internet brings him into contact with several of his brother's old Marine friends, including the guy who held Jeff in his arms as he died. First via e-mail, and then in person, Smith gets to know these men.

D

The All Americans

With his graduation from West Point, Henry Romanek sailed toward Omaha Beach on the eve of Dday. It was June 1944, and he was about to face the bloodiest battle of his life. Just yesterday, it seemed, he was a standout soldier on the Army team. Now, he was a leader of youngsters in battle, fighting, quite literally, for his country and the future of the free world. In this book, Lars Anderson retraces Romanek's life and that of three other soldiers.

E

Copies in Seconds

With the push of a button, anyone can make copies of almost anything - unlike the old days, when papers had to be rewritten long-hand, carbon-copied out of fussy mimeograph machines (蠟紙油印機(jī)). In Copies in Seconds, David Owen showed how a shy engineer named Chester Carlson perfected his xerography machine (靜電復(fù)印機(jī)) and shopped it around until finally hooking up with the Haloid Corporation. That partnership led to the Xerox copier and changed the face of work forever.

F

State of Grace

Back in the late 1950s and early 1960s, the Lynvets was just a football team in a sandy New York City neighborhood. But to most of its members - the author, Robert Timberg, included - the team was their only experience of a happy family, their only chance to rise above terrible everyday circumstances, their only shot at being heroes. The friendships these men formed sustained (維持) them throughout their lives.

請閱讀以下求書者的信息,然后匹配他們所要尋找的書籍:

1. Tom is looking for a book about the hiking stories to help him in his following outdoor activities.

2. Kate wants to find a book about the stories of the soldiers during World War II.   .

3. Mark wants to research into the history of technological development.

4. Jack is researching into education in a college. He is especially interested in the teaching methods. He wants to find a book which can tell him something about how to teach students from different backgrounds.

5. John wants to find some materials about the soldiers in Vietnam War to carry on his new research.

    求書者                           書籍

1. Tom                  A. I Am a Pencil

2. Kate                  B. Between a Rock and a Hard Place    

3. Mark                   C. Our Brother's Keeper

4.Jack                   D. The All Americans

5. John                   E. Copies in Seconds

                                   F. State of Grace

 

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1.解析:,故選A。

2.解析:抽取回族學(xué)生人數(shù)是,故選B。

3.解析:由,得,此時(shí),所以,,故選C。

4.解析:∵,∴,∴,故選C。

5.解析:設(shè)公差為,由題意得,;,解得,故選C。

6.解析:∵雙曲線的右焦點(diǎn)到一條漸近線的距離等于焦距的,∴,又∵,∴,∴雙曲線的漸近線方程是,故選D.

7.解析:∵為正實(shí)數(shù),∴,∴;由均值不等式得恒成立,,故②不恒成立,又因?yàn)楹瘮?shù)是增函數(shù),∴,故恒成立的不等式是①③④。故選C.

8.解析:∵,∴在區(qū)間上恒成立,即在區(qū)間上恒成立,∴,故選D。

9.解析:∵

,∴此函數(shù)的最小正周期是,故選C。

10.解析:如圖,∵正三角形的邊長為,∴,∴,又∵,∴,故選D。

11.解析:∵在區(qū)間上是增函數(shù)且,∴其反函數(shù)在區(qū)間上是增函數(shù),∴,故選A

12.解析:如圖,①當(dāng)時(shí),圓面被分成2塊,涂色方法有20種;②當(dāng)時(shí),圓面被分成3塊,涂色方法有60種;

③當(dāng)時(shí),圓面被分成4塊,涂色方法有120種,所以m的取值范圍是,故選A。

13.解析:將代入結(jié)果為,∴時(shí),表示直線右側(cè)區(qū)域,反之,若表示直線右側(cè)區(qū)域,則,∴是充分不必要條件。

學(xué)科網(wǎng)(Zxxk.Com)14.解析:∵,∴時(shí),,又時(shí),滿足上式,因此,。

學(xué)科網(wǎng)(Zxxk.Com)15.解析:設(shè)正四面體的棱長為,連,取的中點(diǎn),連,∵的中點(diǎn),∴,∴或其補(bǔ)角為所成角,∵,,∴,∴,又∵,∴,∴所成角的余弦值為。

學(xué)科網(wǎng)(Zxxk.Com)16.解析:∵,∴,∵點(diǎn)的準(zhǔn)線與軸的交點(diǎn),由向量的加法法則及拋物線的對稱性可知,點(diǎn)為拋物線上關(guān)于軸對稱的兩點(diǎn)且做出圖形如右圖,其中為點(diǎn)到準(zhǔn)線的距離,四邊形為菱形,∴,∴,∴,∴,∴,∴向量的夾角為。

17.(10分)解析:(Ⅰ)由正弦定理得,,,…2分

,………4分

(Ⅱ)∵,∴,∴,………………………6分

又∵,∴,∴,………………………8分

!10分

18.解析:(Ⅰ)∵,∴;……………………理3文4分

(Ⅱ)∵三科會考不合格的概率均為,∴學(xué)生甲不能拿到高中畢業(yè)證的概率;……………………理6文8分

(Ⅲ)∵每科得A,B的概率分別為,∴學(xué)生甲被評為三好學(xué)生的概率為!12分

19.(12分)解析:(Ⅰ)∵,∴,

 ,,……………3分

(Ⅱ)∵,∴

,

,∴數(shù)列自第2項(xiàng)起是公比為的等比數(shù)列,………………………6分

,………………………8分

(Ⅲ)∵,∴,………………10分

!12分

20.解析:(Ⅰ)∵,∴,∵底面,∴,∴平面,∴,又∵平面,∴,∴平面,∴。………………………4分

(Ⅱ)∵平面,∴,,∴為二面角的平面角,………………………6分

,,∴,又∵平面,,∴,∴二面角的正切值的大小為!8分

(Ⅲ)過點(diǎn),交于點(diǎn),∵平面,∴在平面內(nèi)的射影,∴與平面所成的角,………………………10分

學(xué)科網(wǎng)(Zxxk.Com),∴,又∵,∴與平面所成的角相等,∴與平面所成角的正切值為!12分

解法2:如圖建立空間直角坐標(biāo)系,(Ⅰ)∵,,∴點(diǎn)的坐標(biāo)分別是,,,∴,,設(shè),∵平面,∴,∴,取,∴,∴!4分

(Ⅱ)設(shè)二面角的大小為,∵平面的法向量是,平面的法向量是,∴,∴,∴二面角的正切值的大小為!8分

(Ⅲ)設(shè)與平面所成角的大小為,∵平面的法向量是,,∴,∴,∴與平面所成角的正切值為!12分

21.解析:(Ⅰ)設(shè)拋物線方程為,將代入方程得

所以拋物線方程為!2分

由題意知橢圓的焦點(diǎn)為。

設(shè)橢圓的方程為,

∵過點(diǎn),∴,解得,,

∴橢圓的方程為!5分

(Ⅱ)設(shè)的中點(diǎn)為,的方程為:

為直徑的圓交兩點(diǎn),中點(diǎn)為。

設(shè),則

  

………………………8分

………………………10分

當(dāng)時(shí),,,

此時(shí),直線的方程為。………………………12分

22.(12分)解析:(Ⅰ)∵是偶函數(shù),∴,

又∵,,………………………2分

得,,

時(shí),時(shí),;時(shí),;∴時(shí),函數(shù)


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