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高一上學(xué)期期末數(shù)學(xué)試題考試時(shí)間:120分鐘滿分:150分第I卷(選擇題,共60分)一、單項(xiàng)選擇題(本小題共8小題,每小題5分,共40分,每小題只有一個(gè)選項(xiàng)符合要求)1.已知集合SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,則實(shí)數(shù)SKIPIF1<0的取值范圍為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】【分析】利用交集定義直接求解.【詳解】由集合SKIPIF1<0,SKIPIF1<0,又∵SKIPIF1<0,∴SKIPIF1<0∴實(shí)數(shù)a取值范圍為:SKIPIF1<0.故選:C2.對(duì)任意實(shí)數(shù)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,下列命題中真命題是()A.“SKIPIF1<0”是“SKIPIF1<0”的充要條件B.“SKIPIF1<0是無理數(shù)”是“SKIPIF1<0是無理數(shù)”的充要條件C.“SKIPIF1<0”是“SKIPIF1<0”的充分條件D.“SKIPIF1<0”是“SKIPIF1<0”的充分條件【答案】B【解析】【分析】通過反例可知ACD錯(cuò)誤;根據(jù)充要條件和必要條件的定義可知B正確.【詳解】對(duì)于A,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,此時(shí)可以SKIPIF1<0,必要性不成立,A錯(cuò)誤;對(duì)于B,當(dāng)SKIPIF1<0為無理數(shù)時(shí),根據(jù)SKIPIF1<0為有理數(shù),可知SKIPIF1<0為無理數(shù),充分性成立;當(dāng)SKIPIF1<0為無理數(shù)時(shí),根據(jù)SKIPIF1<0為有理數(shù)可得SKIPIF1<0為無理數(shù),必要性成立;SKIPIF1<0“SKIPIF1<0是無理數(shù)”是“SKIPIF1<0是無理數(shù)”的充要條件,B正確;對(duì)于C,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,但是SKIPIF1<0,故“SKIPIF1<0”不是“SKIPIF1<0”的充分條件,C錯(cuò)誤;對(duì)于D,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,但是SKIPIF1<0,所以“SKIPIF1<0”不是“SKIPIF1<0”的充分條件,D錯(cuò)誤.故選:B.3.若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】【分析】根據(jù)指數(shù)函數(shù)以及對(duì)數(shù)函數(shù)的性質(zhì),確定a,b,c的范圍,即可比較大小,可得答案.【詳解】由函數(shù)SKIPIF1<0為增函數(shù)可知SKIPIF1<0,由SKIPIF1<0為增函數(shù)可得SKIPIF1<0,由由SKIPIF1<0為增函數(shù)可得SKIPIF1<0,所以SKIPIF1<0,故選:D4.某數(shù)學(xué)競(jìng)賽有5名參賽者,需要解答五道綜合題,這五個(gè)人答對(duì)的題數(shù)如下:3,5,4,2,1,則這組數(shù)據(jù)的60%分位數(shù)為()A.3 B.3.5 C.4 D.4.5【答案】B【解析】【分析】首先將數(shù)據(jù)從小到大排列,求得SKIPIF1<0,則第SKIPIF1<0分位數(shù)為第SKIPIF1<0個(gè)數(shù)與第SKIPIF1<0個(gè)數(shù)的平均數(shù),即可得解.【詳解】解:這五人答對(duì)的題數(shù)從小到大排列為:SKIPIF1<0、SKIPIF1<0、SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,又SKIPIF1<0,所以第SKIPIF1<0分位數(shù)為SKIPIF1<0.故選:B5.函數(shù)SKIPIF1<0的反函數(shù)SKIPIF1<0的定義域?yàn)?)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】【分析】根據(jù)反函數(shù)的定義域?yàn)樵瘮?shù)的值域,先求出原函數(shù)的值域,即可得出答案.詳解】SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的值域?yàn)镾KIPIF1<0,SKIPIF1<0反函數(shù)的定義域?yàn)樵瘮?shù)的值域,SKIPIF1<0反函數(shù)SKIPIF1<0的定義域?yàn)镾KIPIF1<0,故選:D.6.在同一坐標(biāo)系內(nèi),函數(shù)SKIPIF1<0和SKIPIF1<0的圖象可能是()A. B. C. D.【答案】B【解析】【分析】根據(jù)冪函數(shù)的圖象與性質(zhì),分SKIPIF1<0和SKIPIF1<0討論,利用排除法,即可求解,得到答案.【詳解】由題意,若SKIPIF1<0時(shí),函數(shù)SKIPIF1<0在SKIPIF1<0遞增,此時(shí)SKIPIF1<0遞增,排除D;縱軸上截距為正數(shù),排除C,即SKIPIF1<0時(shí),不合題意;若SKIPIF1<0時(shí),函數(shù)SKIPIF1<0在SKIPIF1<0遞減,又由SKIPIF1<0遞減可排除A,故選B.【點(diǎn)睛】本題主要考查了冪函數(shù)的圖象與性質(zhì)的應(yīng)用,其中解答中熟記冪函數(shù)的圖象與性質(zhì)是解答的關(guān)鍵,著重考查了推理與運(yùn)算能力,屬于基礎(chǔ)題.7.已知SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】【分析】由SKIPIF1<0確定出1<a<2,再由SKIPIF1<0轉(zhuǎn)化可得b的取值情況而得解.【詳解】因SKIPIF1<0則,a>1,此時(shí)SKIPIF1<0,則有a<2,即1<a<2,又SKIPIF1<0,而SKIPIF1<0,即SKIPIF1<0,b<1,所以SKIPIF1<0.故選:C8.已知函數(shù)SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,使得SKIPIF1<0,則實(shí)數(shù)SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】【分析】根據(jù)題意得到SKIPIF1<0,根據(jù)函數(shù)單調(diào)性得到SKIPIF1<0,SKIPIF1<0,得到不等式,求出實(shí)數(shù)SKIPIF1<0的取值范圍是SKIPIF1<0.【詳解】若SKIPIF1<0,SKIPIF1<0,使得SKIPIF1<0,故只需SKIPIF1<0,其中SKIPIF1<0在SKIPIF1<0上單調(diào)遞減,故SKIPIF1<0,SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,故SKIPIF1<0,所以SKIPIF1<0,解得:SKIPIF1<0,實(shí)數(shù)SKIPIF1<0的取值范圍是SKIPIF1<0.故選:C二、多項(xiàng)選擇題(本小題共4道題,每小題5分,共20分.在每小題給出的四個(gè)選項(xiàng)中,有多項(xiàng)符合題目要求.全部選對(duì)得5分,部分選對(duì)得2分,有錯(cuò)誤答案得0分)9.設(shè)SKIPIF1<0,SKIPIF1<0是兩個(gè)非零向量,則下列描述錯(cuò)誤的有()A.若SKIPIF1<0,則存在實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0.B.若SKIPIF1<0,則SKIPIF1<0.C.若SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0反向.D.若SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0一定同向【答案】ACD【解析】【分析】根據(jù)向量加法的意義判斷選項(xiàng)A,C;根據(jù)平面向量加法的平行四邊形法則可判斷選項(xiàng)B;根據(jù)平面向量平行的性質(zhì)可判斷選項(xiàng)D.【詳解】對(duì)于選項(xiàng)A:當(dāng)SKIPIF1<0,由向量加法的意義知SKIPIF1<0,SKIPIF1<0方向相反且SKIPIF1<0,則存在實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0,故選項(xiàng)A錯(cuò)誤;對(duì)于選項(xiàng)B:當(dāng)SKIPIF1<0,則以SKIPIF1<0,SKIPIF1<0為鄰邊的平行四邊形為矩形,且SKIPIF1<0和SKIPIF1<0是這個(gè)矩形的兩條對(duì)角線長(zhǎng),則SKIPIF1<0,故選項(xiàng)B正確;對(duì)于選項(xiàng)C:當(dāng)SKIPIF1<0,由向量加法的意義知SKIPIF1<0,SKIPIF1<0方向相同,故選項(xiàng)C錯(cuò)誤;對(duì)于選項(xiàng)D:當(dāng)SKIPIF1<0時(shí),則SKIPIF1<0,SKIPIF1<0同向或反向,故選項(xiàng)D錯(cuò)誤;綜上所述:選項(xiàng)ACD錯(cuò)誤,故選:ACD.10.某校組織全體高一學(xué)生參加了主題為“青春心向黨,奮斗正當(dāng)時(shí)”的知識(shí)競(jìng)賽,隨機(jī)抽取了100名學(xué)生進(jìn)行成績(jī)統(tǒng)計(jì),發(fā)現(xiàn)抽取的學(xué)生的成績(jī)都在50分至100分之間,進(jìn)行適當(dāng)分組后(每組的取值區(qū)間均為左閉右開),畫出頻率分布直方圖(如圖),下列說法正確的是()(小數(shù)點(diǎn)后保留一位)A.在被抽取的學(xué)生中,成績(jī)?cè)趨^(qū)間SKIPIF1<0內(nèi)的學(xué)生有20人B.這100名學(xué)生的平均成績(jī)?yōu)?4分C.估計(jì)全校學(xué)生成績(jī)的中位數(shù)為86.7D.估計(jì)全校學(xué)生成績(jī)的樣本數(shù)據(jù)的70%分位數(shù)為91.5【答案】BC【解析】【分析】由頻率和為1可求解x,再由頻率分布直方圖的頻率計(jì)算人數(shù)和中位數(shù)、平均成績(jī),根據(jù)百分?jǐn)?shù)定義計(jì)算70%分位數(shù),對(duì)選項(xiàng)逐個(gè)判斷.【詳解】對(duì)于A,由SKIPIF1<0,得SKIPIF1<0,所以成績(jī)?cè)趨^(qū)間SKIPIF1<0內(nèi)的學(xué)生人數(shù)為SKIPIF1<0,故A不正確;對(duì)于B,平均成績(jī)?yōu)镾KIPIF1<0分,故B正確;對(duì)于C,設(shè)中位數(shù)為SKIPIF1<0,則SKIPIF1<0,得SKIPIF1<0,故C正確;對(duì)于D,設(shè)樣本數(shù)據(jù)的70%分位數(shù)約為SKIPIF1<0分,則SKIPIF1<0,解得SKIPIF1<0.故D不正確.故選:BC.11.在邊長(zhǎng)為4的正方形SKIPIF1<0中,SKIPIF1<0在正方形(含邊)內(nèi),滿足SKIPIF1<0,則下列結(jié)論正確的是()A.若點(diǎn)SKIPIF1<0在SKIPIF1<0上時(shí),則SKIPIF1<0B.SKIPIF1<0的取值范圍為SKIPIF1<0C.若點(diǎn)SKIPIF1<0在SKIPIF1<0上時(shí),SKIPIF1<0D.當(dāng)SKIPIF1<0在線段SKIPIF1<0上時(shí),SKIPIF1<0的最小值為SKIPIF1<0【答案】AD【解析】【分析】根據(jù)題意建立平面直角坐標(biāo)系,然后利用向量的線性坐標(biāo)運(yùn)算逐個(gè)分析判斷即可.詳解】如圖建立平面直角坐標(biāo)系,則SKIPIF1<0,設(shè)SKIPIF1<0,因SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,對(duì)于A,由題意可得線段SKIPIF1<0的方程為SKIPIF1<0,SKIPIF1<0,因?yàn)辄c(diǎn)SKIPIF1<0在SKIPIF1<0上,所以SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以A正確,對(duì)于B,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以B錯(cuò)誤,對(duì)于C,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,因?yàn)镾KIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0,得SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0不滿足,所以SKIPIF1<0不成立,所以C錯(cuò)誤,對(duì)于D,SKIPIF1<0SKIPIF1<0,當(dāng)且僅當(dāng)SKIPIF1<0時(shí)取等號(hào),所以當(dāng)SKIPIF1<0在線段SKIPIF1<0上時(shí),SKIPIF1<0的最小值為SKIPIF1<0,所以D正確,故選:AD12.已知函數(shù)SKIPIF1<0,則()A.SKIPIF1<0的定義域是SKIPIF1<0B.SKIPIF1<0是偶函數(shù)C.SKIPIF1<0是單調(diào)增函數(shù)D若SKIPIF1<0,則SKIPIF1<0,或SKIPIF1<0【答案】AC【解析】【分析】根據(jù)對(duì)數(shù)函數(shù)確定函數(shù)定義域即可判斷選項(xiàng)A,利用函數(shù)奇偶性定義判斷選項(xiàng)B,結(jié)合復(fù)合函數(shù)的單調(diào)性、函數(shù)單調(diào)性性質(zhì)即可判斷選項(xiàng)C,由單調(diào)性解不等式即可判斷選項(xiàng)D.【詳解】解:函數(shù)SKIPIF1<0的定義域滿足SKIPIF1<0,解得SKIPIF1<0,則SKIPIF1<0的定義域是SKIPIF1<0,故A正確;所以SKIPIF1<0,且SKIPIF1<0,故SKIPIF1<0是非奇非偶函數(shù),故B不正確;由于函數(shù)SKIPIF1<0,由復(fù)合函數(shù)單調(diào)性可得SKIPIF1<0在SKIPIF1<0上為單調(diào)增函數(shù),又函數(shù)SKIPIF1<0,由復(fù)合函數(shù)單調(diào)性可得SKIPIF1<0在SKIPIF1<0上為單調(diào)增函數(shù),所以SKIPIF1<0是單調(diào)增函數(shù),故C正確;由SKIPIF1<0是SKIPIF1<0上的單調(diào)增函數(shù),且SKIPIF1<0,所以SKIPIF1<0可得:SKIPIF1<0,所以SKIPIF1<0,解得SKIPIF1<0或SKIPIF1<0,故D不正確.故選:AC.第II卷(選擇題,共90分)三、填空題(本題共4小題,每小題5分,共20分)13.已知SKIPIF1<0的范圍為SKIPIF1<0,且每個(gè)隨機(jī)變量對(duì)應(yīng)概率相等,(1)SKIPIF1<0______;(2)若SKIPIF1<0,則SKIPIF1<0______.【答案】①.SKIPIF1<0②.SKIPIF1<0【解析】【分析】分析符合題意的SKIPIF1<0取值情況再計(jì)算概率.【詳解】SKIPIF1<0且SKIPIF1<0即SKIPIF1<0,故SKIPIF1<0;SKIPIF1<0,則SKIPIF1<0取值為16,36,46,故SKIPIF1<0.故答案為:SKIPIF1<0,SKIPIF1<0.14.已知函數(shù)SKIPIF1<0是定義在SKIPIF1<0上的增函數(shù),則SKIPIF1<0的取值范圍是______.【答案】SKIPIF1<0【解析】【分析】由已知,要想保證函數(shù)SKIPIF1<0是定義在SKIPIF1<0上的增函數(shù),需滿足分段函數(shù)兩部分在各自區(qū)間上單調(diào)遞增,然后再滿足連續(xù)單增,即比較當(dāng)SKIPIF1<0時(shí),左邊函數(shù)的最大值小于等于右邊函數(shù)的最小值,列式即可完成求解.【詳解】由已知,函數(shù)SKIPIF1<0是定義為在SKIPIF1<0上的增函數(shù),則SKIPIF1<0在SKIPIF1<0上為單調(diào)遞增函數(shù),SKIPIF1<0在SKIPIF1<0上為單調(diào)遞增函數(shù),且SKIPIF1<0,所以SKIPIF1<0,解得SKIPIF1<0,所以SKIPIF1<0的取值范圍是SKIPIF1<0.故答案為:SKIPIF1<015.在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0均大于0),則SKIPIF1<0的值為______.【答案】15【解析】【分析】利用平面向量基本定理和向量三角形法則,可表示SKIPIF1<0,進(jìn)而求出SKIPIF1<0,SKIPIF1<0的值,即可求出結(jié)果.【詳解】如圖所示,在SKIPIF1<0中,SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,①在SKIPIF1<0中,SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,代入①,得SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,故答案為:SKIPIF1<0.16.已知函數(shù)SKIPIF1<0,(1)當(dāng)方程SKIPIF1<0有三個(gè)不同的實(shí)根,SKIPIF1<0______,.(2)當(dāng)方程SKIPIF1<0有四個(gè)不同的實(shí)根,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,滿足SKIPIF1<0,則SKIPIF1<0的值是______.【答案】①.0或2##2或0②.12【解析】【分析】(1)畫出函數(shù)圖像直接得到答案;(2)從圖像觀察出SKIPIF1<0分別是函數(shù)SKIPIF1<0和SKIPIF1<0自變量,SKIPIF1<0是函數(shù)SKIPIF1<0的兩個(gè)自變量,代入化簡(jiǎn)求解.【詳解】當(dāng)SKIPIF1<0時(shí),SKIPIF1<0畫圖為觀察圖像發(fā)現(xiàn)當(dāng)SKIPIF1<0或SKIPIF1<0時(shí),有三個(gè)不同的實(shí)根;觀察圖像發(fā)現(xiàn)當(dāng)SKIPIF1<0時(shí),有SKIPIF1<0個(gè)不同的實(shí)根,SKIPIF1<0,并且SKIPIF1<0SKIPIF1<0分別是函數(shù)SKIPIF1<0和SKIPIF1<0自變量,所以SKIPIF1<0所以SKIPIF1<0;SKIPIF1<0是函數(shù)SKIPIF1<0的兩個(gè)自變量,又因?yàn)镾KIPIF1<0所以SKIPIF1<0故SKIPIF1<0故答案為:0或2;12四、解答題(本題共6小題,共70分.解答題應(yīng)寫出文字說明、證明過程或演算步驟.)17.(1)當(dāng)SKIPIF1<0時(shí),求SKIPIF1<0的值.(2)化簡(jiǎn)求值:SKIPIF1<0.【答案】(1)SKIPIF1<0;(2)SKIPIF1<0.【解析】【分析】(1)根據(jù)指數(shù)的運(yùn)算,代入計(jì)算即可得到結(jié)果;(2)根據(jù)對(duì)數(shù)的運(yùn)算,代入計(jì)算即可得到結(jié)果.【詳解】(1)因?yàn)镾KIPIF1<0,所以SKIPIF1<0(2)原式SKIPIF1<018.為了更好了解新高一男同學(xué)的身高情況,某校高一年級(jí)從男同學(xué)中隨機(jī)抽取100名新生,分別對(duì)他們的身高進(jìn)行了測(cè)量,并將測(cè)量數(shù)據(jù)分為以下五組:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0進(jìn)行整理,如下表所示:組號(hào)分組頻數(shù)第1組SKIPIF1<05第2組SKIPIF1<035第3組SKIPIF1<030第4組SKIPIF1<020第5組SKIPIF1<010合計(jì)100(1)在答題紙中,畫出頻率分布直方圖:(2)若在第3,4兩組中,用分層抽樣的方法抽取5名新生,再?gòu)倪@5名新生中隨機(jī)抽取2名新生進(jìn)行體能測(cè)試,求這2名新生來自不同組的概率.【答案】(1)作圖見解析(2)SKIPIF1<0【解析】【分析】(1)根據(jù)表中數(shù)據(jù)補(bǔ)全頻率分布直方圖即可求解;(2)根據(jù)分層抽樣先求出兩組抽取的人員數(shù)并對(duì)這5名人員進(jìn)行標(biāo)記,然后列出所有的基本事件個(gè)數(shù),根據(jù)古典概型的概率公式即可求解.【小問1詳解】頻率分布直方圖如下圖所示:【小問2詳解】因?yàn)榈?,4組共有50名新生,所以利用分層抽樣從中抽取5名,每組應(yīng)抽取的人數(shù)分別為:第3組:SKIPIF1<0名,第4組:SKIPIF1<0名,設(shè)第3組抽取的3名新生分別為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,第4組抽取的2名新生分別為SKIPIF1<0,SKIPIF1<0.從這5名新生中隨機(jī)抽取2名新生,有以下10種情況:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0這2名新生來自不同組的情況有以下6種:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,故所求的概率SKIPIF1<0.19.已知向量SKIPIF1<0,SKIPIF1<0,當(dāng)SKIPIF1<0為何值時(shí),(1)求SKIPIF1<0和SKIPIF1<0(2)SKIPIF1<0與SKIPIF1<0平行?平行時(shí)它們是同向還是反向?【答案】(1)SKIPIF1<0,SKIPIF1<0(2)平行,反向.【解析】【分析】(1)直接由向量的數(shù)乘,坐標(biāo)加減法運(yùn)算,以及向量模的計(jì)算公式求解;(2)利用向量平行的條件即可求出SKIPIF1<0的值,再判斷結(jié)論即可.【小問1詳解】向量SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0,SKIPIF1<0.【小問2詳解】若SKIPIF1<0與SKIPIF1<0平行,則存在實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0,因此SKIPIF1<0,解之得SKIPIF1<0,這時(shí)SKIPIF1<0,所以它們平行,且反向.20.設(shè)函數(shù)SKIPIF1<0(SKIPIF1<0且SKIPIF1<0)是定義域?yàn)镾KIPIF1<0的奇函數(shù).(1)求實(shí)數(shù)SKIPIF1<0的值;(2)若SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0在SKIPIF1<0上的最小值為SKIPIF1<0,求實(shí)數(shù)SKIPIF1<0的值.【答案】(1)SKIPIF1<0(2)SKIPIF1<0【解析】【分析】(1)根據(jù)奇函數(shù)SKIPIF1<0求解即可;(2)根據(jù)SKIPIF1<0求出a的值,再求出SKIPIF1<0,利用換元法得到SKIPIF1<0,再分為SKIPIF1<0時(shí),和SKIPIF1<0時(shí)兩種情況求解即可.【小問1詳解】SKIPIF1<0是定義域?yàn)镾KIPIF1<0的奇函數(shù),SKIPIF1<0,SKIPIF1<0,即SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,即SKIPIF1<0,符合條件.故SKIPIF1<0;【小問2詳解】SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(舍),故SKIPIF1<0,令SKIPIF1<0,SKIPIF1<0是單調(diào)遞增函數(shù),SKIPIF1<0,故SKIPIF1<0,SKIPIF1<0,函數(shù)圖象的對(duì)稱軸為SKIPIF1<0,①當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,解得SKIPIF1<0.②當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,解得SKIPIF1<0,不符合SKIPIF1<0,綜上,SKIPIF1<0.21.布勞威爾不動(dòng)點(diǎn)定理是拓?fù)鋵W(xué)里一個(gè)非常重要的不動(dòng)點(diǎn)定理,它得名于荷蘭數(shù)學(xué)家魯伊茲·布勞威爾,簡(jiǎn)單地講就是對(duì)于滿足一定條件的連續(xù)實(shí)函數(shù)SKIPIF1<0,存在一個(gè)點(diǎn)SKIPIF1<0,使得SKIPIF1<0,那么我們稱該函數(shù)為“不動(dòng)點(diǎn)"函數(shù),而稱SKIPIF1<0為該函數(shù)的一個(gè)不動(dòng)點(diǎn).現(xiàn)新定義:若SKIPIF1<0滿足SKIPIF1<0,則稱SKIPIF1<0為SKIPIF1<0的次不動(dòng)點(diǎn).(1)判斷函數(shù)SKIPIF1<0是否是“不動(dòng)點(diǎn)”函數(shù),若是,求出其不動(dòng)點(diǎn);若不是,請(qǐng)說明理由(2)已知函數(shù)SKIPIF1<0,若SKIPIF1<0是SKIPIF1<0的次不動(dòng)點(diǎn),求實(shí)數(shù)SKIPIF1<0的值:(3)若函數(shù)SKIPIF1<0在SKIPIF1<0上僅有一個(gè)不動(dòng)點(diǎn)和一個(gè)次不動(dòng)點(diǎn),求實(shí)數(shù)SKIPIF1<0的取值范圍.【答案】(1)是“不動(dòng)點(diǎn)”函數(shù),不動(dòng)點(diǎn)是2和SKIPIF1<0;(2)SKIPIF1<0;(3)SKIPIF1<0.【解析】【分析】(1)根據(jù)不動(dòng)點(diǎn)定義列出方程,求解方程即可作答.(2)根據(jù)次不動(dòng)點(diǎn)定義列出方程,求解方程即可作答.(3)設(shè)出不動(dòng)點(diǎn)和次不動(dòng)點(diǎn),建立函數(shù)關(guān)系,求出函數(shù)最值推理作答.【小問1詳解】依題意,設(shè)SKIPIF1<0為SKIPIF1<0的不動(dòng)點(diǎn),即SKIPIF1<0,于是得SKIPIF1<0,解得SKIPIF1<0或SKIPIF1<0,所以SKIPIF1<0是“不動(dòng)點(diǎn)”函數(shù),不動(dòng)點(diǎn)是2和SKIPIF1<0.【小問2詳解】因SKIPIF1<0是“次不動(dòng)點(diǎn)”函數(shù),依題意有SKIPIF1<0,即SKIPIF1<0,顯然SKIPIF1<0,解得SKIPIF1<0,所以實(shí)數(shù)SKIPIF1<0的值是SKIPIF1<0.【小問3詳解】設(shè)SKIPIF1<0分別是函數(shù)SKIPIF1<0在SKIPIF1<0上的不動(dòng)點(diǎn)和次不動(dòng)點(diǎn),且SKIPIF1<0唯一,由SKIPIF1<0得:SKIPIF1<0,即SKIPIF1<0,整理得:SKIPIF1<0,令SKIPIF1<0,顯然函數(shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,則SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,由SKIPIF1<0得:SKIPIF1<0,即SKIPIF1<0,整理得:SKIPIF1<0,令SKIPIF1<0,顯然函數(shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,綜上得:SKIPIF1<0,所以實(shí)數(shù)SKIPIF1<0的取值范圍SKIPIF1<0.【點(diǎn)睛】思路點(diǎn)睛:涉及函數(shù)新定義問題,理解新定義,找出數(shù)量關(guān)系,聯(lián)想與題意有關(guān)的數(shù)學(xué)知識(shí)和方法,再轉(zhuǎn)化、抽象

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