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新高考數(shù)學(xué)考前沖刺卷數(shù)學(xué)(十一)注意事項(xiàng):1.答題前,先將自己的姓名、準(zhǔn)考證號(hào)填寫在試題卷和答題卡上,并將準(zhǔn)考證號(hào)條形碼粘貼在答題卡上的指定位置。2.選擇題的作答:每小題選出答案后,用2B鉛筆把答題卡上對(duì)應(yīng)題目的答案標(biāo)號(hào)涂黑,寫在試題卷、草稿紙和答題卡上的非答題區(qū)域均無(wú)效。3.非選擇題的作答:用簽字筆直接答在答題卡上對(duì)應(yīng)的答題區(qū)域內(nèi)。寫在試題卷、草稿紙和答題卡上的非答題區(qū)域均無(wú)效。4.考試結(jié)束后,請(qǐng)將本試題卷和答題卡一并上交。第Ⅰ卷(選擇題)一、單項(xiàng)選擇題:本題共8小題,每小題5分,共40分.在每小題給出的四個(gè)選項(xiàng)中,只有一項(xiàng)是符合題目要求的.1.已知集合SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.已知復(fù)數(shù)SKIPIF1<0(i為虛數(shù)單位),則在復(fù)平面內(nèi)SKIPIF1<0對(duì)應(yīng)的點(diǎn)位于()A.第一象限 B.第二象限 C.第三象限 D.第四象限3.下列說(shuō)法中正確的是()A.命題“p且q”為真命題,則p?q恰有一個(gè)為真命題B.命題“SKIPIF1<0,SKIPIF1<0”,則“SKIPIF1<0,SKIPIF1<0”C.命題“函數(shù)SKIPIF1<0有三個(gè)不同的零點(diǎn)”的逆否命題是真命題D.設(shè)等比數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,則“SKIPIF1<0”是“SKIPIF1<0”的充分必要條件4.等差數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,若SKIPIF1<0,則數(shù)列SKIPIF1<0的通項(xiàng)公式可能是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.已知偶函數(shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,若SKIPIF1<0,則滿足SKIPIF1<0的SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.在區(qū)間SKIPIF1<0上任取一個(gè)實(shí)數(shù)SKIPIF1<0,則使得直線SKIPIF1<0與圓SKIPIF1<0有公共點(diǎn)的概率是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.已知SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0的夾角為SKIPIF1<0,若向量SKIPIF1<0,則SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<08.若直線SKIPIF1<0是曲線SKIPIF1<0的切線,也是曲線SKIPIF1<0的切線,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多項(xiàng)選擇題:本題共4小題,每小題5分,共20分.在每小題給出的選項(xiàng)中,有多項(xiàng)符合題目要求.全部選對(duì)的得5分,部分選對(duì)的得2分,有選錯(cuò)的得0分.9.有關(guān)獨(dú)立性檢驗(yàn)的四個(gè)命題,其中正確的是()A.兩個(gè)變量的2×2列聯(lián)表中,對(duì)角線上數(shù)據(jù)的乘積相差越大,說(shuō)明兩個(gè)變量有關(guān)系成立的可能性就越大B.對(duì)分類變量X與Y的隨機(jī)變量SKIPIF1<0的觀測(cè)值k來(lái)說(shuō),k越小,“X與Y有關(guān)系”的可信程度越小C.從獨(dú)立性檢驗(yàn)可知:有95%的把握認(rèn)為禿頂與患心臟病有關(guān),我們說(shuō)某人禿頂,那么他有95%的可能患有心臟病D.從獨(dú)立性檢驗(yàn)可知:有99%的把握認(rèn)為吸煙與患肺癌有關(guān),是指在犯錯(cuò)誤的概率不超過(guò)1%的前提下認(rèn)為吸煙與患肺癌有關(guān)10.對(duì)于給定的異面直線SKIPIF1<0、SKIPIF1<0,以下判斷正確的是()A.存在平面SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0B.存在直線SKIPIF1<0,使得SKIPIF1<0同時(shí)與SKIPIF1<0、SKIPIF1<0垂直且相交C.存在平面SKIPIF1<0、SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0D.對(duì)于任意點(diǎn)SKIPIF1<0,總存在過(guò)SKIPIF1<0且與SKIPIF1<0、SKIPIF1<0都相交的直線11.已知SKIPIF1<0,則下列結(jié)論正確的是()A.SKIPIF1<0的最小正周期為SKIPIF1<0 B.SKIPIF1<0的最大值為SKIPIF1<0C.SKIPIF1<0在SKIPIF1<0上單調(diào)遞增 D.SKIPIF1<0在SKIPIF1<0上單調(diào)遞減12.關(guān)于函數(shù)SKIPIF1<0,下列判斷正確的是()A.SKIPIF1<0是SKIPIF1<0的極大值點(diǎn)B.函數(shù)SKIPIF1<0有且只有1個(gè)零點(diǎn)C.存在正實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0恒成立D.對(duì)任意兩個(gè)正實(shí)數(shù)SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0第Ⅱ卷(非選擇題)三、填空題:本大題共4小題,每小題5分.13.圣宋元寶,是中國(guó)古代錢幣之一,宋徽宗趙佶建中靖國(guó)元年(公元101年)始鑄,是仁宗“皇宋通寶”之后又一種不以年號(hào)命名的非年號(hào)錢,種類主要有小平和折二兩種.小明同學(xué)珍藏有小平錢2枚,折二錢3枚,現(xiàn)隨機(jī)抽取2枚贈(zèng)好友,則贈(zèng)送的兩枚為不同種類的概率為_________.14.已知SKIPIF1<0外接圓的直徑為d,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0_________.15.設(shè)SKIPIF1<0;SKIPIF1<0,若SKIPIF1<0是SKIPIF1<0的必要不充分條件,則SKIPIF1<0的取值范圍為________.16.已知SKIPIF1<0、SKIPIF1<0分別為橢圓SKIPIF1<0的左、右焦點(diǎn),點(diǎn)SKIPIF1<0關(guān)于直線SKIPIF1<0對(duì)稱的點(diǎn)Q在橢圓上,則橢圓的離心率為_________;若過(guò)SKIPIF1<0且斜率為SKIPIF1<0的直線與橢圓相交于AB兩點(diǎn),且SKIPIF1<0,則SKIPIF1<0_________.四、解答題:本大題共6個(gè)大題,共70分,解答應(yīng)寫出文字說(shuō)明、證明過(guò)程或演算步驟.17.(10分)已知數(shù)列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(1)求證:數(shù)列SKIPIF1<0為等差數(shù)列;(2)設(shè)數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和SKIPIF1<0.證明:SKIPIF1<0.18.(12分)在SKIPIF1<0中,角A,B,C的對(duì)邊分別為SKIPIF1<0,SKIPIF1<0,點(diǎn)D在邊AC上,且SKIPIF1<0,SKIPIF1<0.(1)求角B的大??;(2)求SKIPIF1<0面積的最大值.19.(12分)某年某省有40萬(wàn)考生參加高考.已知考試總分為750分,一本院校在該省計(jì)劃招生6萬(wàn)人.經(jīng)考試后統(tǒng)計(jì),考試成績(jī)X服從正態(tài)分布SKIPIF1<0,若以省計(jì)劃招生數(shù)確定一本最低錄取分?jǐn)?shù).(1)已知SKIPIF1<0,則該省這一年的一本最低錄取分?jǐn)?shù)約為多少?(2)某公司為考生制定了如下獎(jiǎng)勵(lì)方案:所有高考成績(jī)不低于一本最低錄取分?jǐn)?shù)的考生均可參加“線上抽獎(jiǎng)送話費(fèi)”活動(dòng),每個(gè)考生只能抽獎(jiǎng)一次.抽獎(jiǎng)?wù)唿c(diǎn)擊抽獎(jiǎng)按鈕,即隨機(jī)產(chǎn)生一個(gè)兩位數(shù)(10,11,…,99),若產(chǎn)生的兩位數(shù)字相同,則可獎(jiǎng)勵(lì)20元話費(fèi),否則獎(jiǎng)勵(lì)5元,假如所有符合條件的考生均參加抽獎(jiǎng)活動(dòng),估計(jì)這次活動(dòng)獎(jiǎng)勵(lì)的話費(fèi)總額是多少?20.(12分)如圖,SKIPIF1<0,SKIPIF1<0分別是圓臺(tái)上下底面的圓心,SKIPIF1<0是下底面圓的直徑,SKIPIF1<0,點(diǎn)SKIPIF1<0是下底面內(nèi)以SKIPIF1<0為直徑的圓上的一個(gè)動(dòng)點(diǎn)(點(diǎn)SKIPIF1<0不在SKIPIF1<0上).(1)求證:平面SKIPIF1<0平面SKIPIF1<0;(2)若SKIPIF1<0,SKIPIF1<0,求二面角SKIPIF1<0的余弦值.21.(12分)已知雙曲線SKIPIF1<0(SKIPIF1<0,SKIPIF1<0)的焦距為SKIPIF1<0,且雙曲線SKIPIF1<0右支上一動(dòng)點(diǎn)SKIPIF1<0到兩條漸近線SKIPIF1<0,SKIPIF1<0的距離之積為SKIPIF1<0.(1)求雙曲線SKIPIF1<0的方程;(2)設(shè)直線SKIPIF1<0是曲線SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線,且SKIPIF1<0分別交兩條漸近線SKIPIF1<0,SKIPIF1<0于SKIPIF1<0、SKIPIF1<0兩點(diǎn),SKIPIF1<0為坐標(biāo)原點(diǎn),證明:SKIPIF1<0面積為定值,并求出該定值.22.(12分)已知SKIPIF1<0,SKIPIF1<0.(1)若SKIPIF1<0在點(diǎn)SKIPIF1<0處的切線斜率為SKIPIF1<0,求實(shí)數(shù)SKIPIF1<0的值;(2)若SKIPIF1<0有兩個(gè)零點(diǎn),且SKIPIF1<0,求證:SKIPIF1<0.新高考數(shù)學(xué)考前沖刺卷數(shù)學(xué)(十一)注意事項(xiàng):1.答題前,先將自己的姓名、準(zhǔn)考證號(hào)填寫在試題卷和答題卡上,并將準(zhǔn)考證號(hào)條形碼粘貼在答題卡上的指定位置。2.選擇題的作答:每小題選出答案后,用2B鉛筆把答題卡上對(duì)應(yīng)題目的答案標(biāo)號(hào)涂黑,寫在試題卷、草稿紙和答題卡上的非答題區(qū)域均無(wú)效。3.非選擇題的作答:用簽字筆直接答在答題卡上對(duì)應(yīng)的答題區(qū)域內(nèi)。寫在試題卷、草稿紙和答題卡上的非答題區(qū)域均無(wú)效。4.考試結(jié)束后,請(qǐng)將本試題卷和答題卡一并上交。第Ⅰ卷(選擇題)一、單項(xiàng)選擇題:本題共8小題,每小題5分,共40分.在每小題給出的四個(gè)選項(xiàng)中,只有一項(xiàng)是符合題目要求的.1.已知集合SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,故選D.2.已知復(fù)數(shù)SKIPIF1<0(i為虛數(shù)單位),則在復(fù)平面內(nèi)SKIPIF1<0對(duì)應(yīng)的點(diǎn)位于()A.第一象限 B.第二象限 C.第三象限 D.第四象限【答案】B【解析】因?yàn)閺?fù)數(shù)SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,所以在復(fù)平面內(nèi)SKIPIF1<0對(duì)應(yīng)點(diǎn)的坐標(biāo)為SKIPIF1<0,位于第二象限,故選B.3.下列說(shuō)法中正確的是()A.命題“p且q”為真命題,則p?q恰有一個(gè)為真命題B.命題“SKIPIF1<0,SKIPIF1<0”,則“SKIPIF1<0,SKIPIF1<0”C.命題“函數(shù)SKIPIF1<0有三個(gè)不同的零點(diǎn)”的逆否命題是真命題D.設(shè)等比數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,則“SKIPIF1<0”是“SKIPIF1<0”的充分必要條件【答案】D【解析】A選項(xiàng),“p且q”為真命題,則SKIPIF1<0都是真命題,所以A選項(xiàng)錯(cuò)誤;B選項(xiàng),SKIPIF1<0是全稱量詞命題,其否定是存在量詞命題,所以B選項(xiàng)錯(cuò)誤;C選項(xiàng),SKIPIF1<0,SKIPIF1<0,SKIPIF1<0為單調(diào)遞增函數(shù),只有SKIPIF1<0個(gè)零點(diǎn),所以原命題是假命題,其逆否命題也是假命題;D選項(xiàng),SKIPIF1<0(等比數(shù)列公比SKIPIF1<0),所以D選項(xiàng)正確,故選D.4.等差數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,若SKIPIF1<0,則數(shù)列SKIPIF1<0的通項(xiàng)公式可能是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】B【解析】因?yàn)镾KIPIF1<0是等差數(shù)列,且SKIPIF1<0,得SKIPIF1<0,對(duì)于A,SKIPIF1<0,故錯(cuò)誤;對(duì)于B,SKIPIF1<0,SKIPIF1<0,故正確;對(duì)于C,SKIPIF1<0,SKIPIF1<0,故錯(cuò)誤;對(duì)于D,SKIPIF1<0,故錯(cuò)誤,故選B.5.已知偶函數(shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,若SKIPIF1<0,則滿足SKIPIF1<0的SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】因?yàn)榕己瘮?shù)SKIPIF1<0在SKIPIF1<0上單調(diào)遞增,所以SKIPIF1<0在SKIPIF1<0上單調(diào)遞減,且SKIPIF1<0,由SKIPIF1<0,得SKIPIF1<0,解得SKIPIF1<0,故選D.6.在區(qū)間SKIPIF1<0上任取一個(gè)實(shí)數(shù)SKIPIF1<0,則使得直線SKIPIF1<0與圓SKIPIF1<0有公共點(diǎn)的概率是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】C【解析】圓SKIPIF1<0的圓心為SKIPIF1<0,半徑為1,要使直線SKIPIF1<0與圓SKIPIF1<0有公共點(diǎn),則圓心到直線SKIPIF1<0的距離SKIPIF1<0,解得SKIPIF1<0.在區(qū)間SKIPIF1<0中隨機(jī)取一個(gè)實(shí)數(shù)SKIPIF1<0,則事件“直線SKIPIF1<0與圓SKIPIF1<0有公共點(diǎn)”發(fā)生的概率為SKIPIF1<0,故選C.7.已知SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0的夾角為SKIPIF1<0,若向量SKIPIF1<0,則SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】不妨設(shè)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,設(shè)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,由于SKIPIF1<0,故SKIPIF1<0,故選D.8.若直線SKIPIF1<0是曲線SKIPIF1<0的切線,也是曲線SKIPIF1<0的切線,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】D【解析】設(shè)曲線SKIPIF1<0上的點(diǎn)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0;曲線SKIPIF1<0上的點(diǎn)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,故選D.二、多項(xiàng)選擇題:本題共4小題,每小題5分,共20分.在每小題給出的選項(xiàng)中,有多項(xiàng)符合題目要求.全部選對(duì)的得5分,部分選對(duì)的得2分,有選錯(cuò)的得0分.9.有關(guān)獨(dú)立性檢驗(yàn)的四個(gè)命題,其中正確的是()A.兩個(gè)變量的2×2列聯(lián)表中,對(duì)角線上數(shù)據(jù)的乘積相差越大,說(shuō)明兩個(gè)變量有關(guān)系成立的可能性就越大B.對(duì)分類變量X與Y的隨機(jī)變量SKIPIF1<0的觀測(cè)值k來(lái)說(shuō),k越小,“X與Y有關(guān)系”的可信程度越小C.從獨(dú)立性檢驗(yàn)可知:有95%的把握認(rèn)為禿頂與患心臟病有關(guān),我們說(shuō)某人禿頂,那么他有95%的可能患有心臟病D.從獨(dú)立性檢驗(yàn)可知:有99%的把握認(rèn)為吸煙與患肺癌有關(guān),是指在犯錯(cuò)誤的概率不超過(guò)1%的前提下認(rèn)為吸煙與患肺癌有關(guān)【答案】ABD【解析】選項(xiàng)A,兩個(gè)變量的2×2列聯(lián)表中,對(duì)角線上數(shù)據(jù)的乘積相差越大,則SKIPIF1<0觀測(cè)值越大,兩個(gè)變量有關(guān)系的可能性越大,所以選項(xiàng)A正確;選項(xiàng)B,根據(jù)SKIPIF1<0的觀測(cè)值SKIPIF1<0越小,原假設(shè)“X與Y沒關(guān)系”成立的可能性越大,則“X與Y有關(guān)系”的可信度越小,所以選項(xiàng)B正確;選項(xiàng)C,從獨(dú)立性檢驗(yàn)可知:有95%的把握認(rèn)為禿頂與患心臟病有關(guān),不表示某人禿頂他有95%的可能患有心臟病,所以選項(xiàng)C不正確;選項(xiàng)D,從獨(dú)立性檢驗(yàn)可知:有99%的把握認(rèn)為吸煙與患肺癌有關(guān),是指在犯錯(cuò)誤的概率不超過(guò)1%的前提下認(rèn)為吸煙與患肺癌有關(guān),是獨(dú)立性檢驗(yàn)的解釋,所以選項(xiàng)D正確,故選ABD.10.對(duì)于給定的異面直線SKIPIF1<0、SKIPIF1<0,以下判斷正確的是()A.存在平面SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0B.存在直線SKIPIF1<0,使得SKIPIF1<0同時(shí)與SKIPIF1<0、SKIPIF1<0垂直且相交C.存在平面SKIPIF1<0、SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0D.對(duì)于任意點(diǎn)SKIPIF1<0,總存在過(guò)SKIPIF1<0且與SKIPIF1<0、SKIPIF1<0都相交的直線【答案】BC【解析】對(duì)于A選項(xiàng),若存在平面SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,與題設(shè)條件矛盾,假設(shè)不成立,A選項(xiàng)錯(cuò)誤;對(duì)于B選項(xiàng),作直線SKIPIF1<0,使得SKIPIF1<0且SKIPIF1<0,則直線SKIPIF1<0、SKIPIF1<0確定平面SKIPIF1<0,如下圖所示:過(guò)點(diǎn)SKIPIF1<0作直線SKIPIF1<0,使得SKIPIF1<0.①若SKIPIF1<0與SKIPIF1<0相交,則直線SKIPIF1<0即為所求作的直線SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,即直線SKIPIF1<0同時(shí)與SKIPIF1<0、SKIPIF1<0垂直且相交;②若直線SKIPIF1<0與SKIPIF1<0異面,過(guò)直線SKIPIF1<0作平面SKIPIF1<0,使得SKIPIF1<0,設(shè)直線SKIPIF1<0與SKIPIF1<0確定的平面為SKIPIF1<0,且SKIPIF1<0,由線面平行的性質(zhì)定理可得SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,同理可知SKIPIF1<0,由圖可知,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,同理可知,直線SKIPIF1<0與SKIPIF1<0也相交.此時(shí),存在直線SKIPIF1<0,使得SKIPIF1<0同時(shí)與SKIPIF1<0、SKIPIF1<0垂直且相交.綜上所述,存在直線SKIPIF1<0,使得SKIPIF1<0同時(shí)與SKIPIF1<0、SKIPIF1<0垂直且相交,B選項(xiàng)正確;對(duì)于C選項(xiàng),作直線SKIPIF1<0,使得直線SKIPIF1<0與SKIPIF1<0相交且SKIPIF1<0,直線SKIPIF1<0與SKIPIF1<0確定平面SKIPIF1<0,作直線SKIPIF1<0,使得直線SKIPIF1<0與SKIPIF1<0相交且SKIPIF1<0,直線SKIPIF1<0與SKIPIF1<0確定平面SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,同理可得SKIPIF1<0,因?yàn)橹本€SKIPIF1<0與SKIPIF1<0相交,且直線SKIPIF1<0與SKIPIF1<0確定平面SKIPIF1<0,所以SKIPIF1<0,因此,存在平面SKIPIF1<0、SKIPIF1<0,使得SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,C選項(xiàng)正確;對(duì)于D選項(xiàng),若點(diǎn)SKIPIF1<0既不在直線SKIPIF1<0上,也不在直線SKIPIF1<0上,則點(diǎn)SKIPIF1<0與直線SKIPIF1<0可確定平面SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),無(wú)法找到過(guò)點(diǎn)SKIPIF1<0的直線同時(shí)與SKIPIF1<0、SKIPIF1<0相交,D選項(xiàng)錯(cuò)誤,故選BC.11.已知SKIPIF1<0,則下列結(jié)論正確的是()A.SKIPIF1<0的最小正周期為SKIPIF1<0 B.SKIPIF1<0的最大值為SKIPIF1<0C.SKIPIF1<0在SKIPIF1<0上單調(diào)遞增 D.SKIPIF1<0在SKIPIF1<0上單調(diào)遞減【答案】ABD【解析】SKIPIF1<0的最小正周期為SKIPIF1<0,SKIPIF1<0的最小正周期為SKIPIF1<0,所以SKIPIF1<0的最小正周期為SKIPIF1<0,A正確;SKIPIF1<0,設(shè)SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,令SKIPIF1<0,得SKIPIF1<0或SKIPIF1<0.當(dāng)SKIPIF1<0時(shí),SKIPIF1<0;當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,可知當(dāng)SKIPIF1<0時(shí),SKIPIF1<0取得最大值,不妨取SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),根據(jù)題意知SKIPIF1<0,∴SKIPIF1<0,則SKIPIF1<0,B正確;∵SKIPIF1<0,∴SKIPIF1<0,SKIPIF1<0單調(diào)遞增,SKIPIF1<0,SKIPIF1<0不單調(diào),則SKIPIF1<0不單調(diào),C錯(cuò)誤;∵SKIPIF1<0,∴SKIPIF1<0,SKIPIF1<0單調(diào)遞減,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0單調(diào)遞減,則SKIPIF1<0單調(diào)遞減,D正確,故選ABD.12.關(guān)于函數(shù)SKIPIF1<0,下列判斷正確的是()A.SKIPIF1<0是SKIPIF1<0的極大值點(diǎn)B.函數(shù)SKIPIF1<0有且只有1個(gè)零點(diǎn)C.存在正實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0恒成立D.對(duì)任意兩個(gè)正實(shí)數(shù)SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0【答案】BD【解析】A:函數(shù)SKIPIF1<0的定義域?yàn)镾KIPIF1<0,SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,SKIPIF1<0單調(diào)遞減;當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,SKIPIF1<0單調(diào)遞增,所以SKIPIF1<0是SKIPIF1<0的極小值點(diǎn),故A錯(cuò)誤;B:SKIPIF1<0,SKIPIF1<0,所以函數(shù)在SKIPIF1<0上單調(diào)遞減,又SKIPIF1<0,SKIPIF1<0,所以函數(shù)SKIPIF1<0有且只有1個(gè)零點(diǎn),故B正確;C:若SKIPIF1<0,即SKIPIF1<0,則SKIPIF1<0,令SKIPIF1<0,則SKIPIF1<0,令SKIPIF1<0,則SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,SKIPIF1<0單調(diào)遞增;當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,SKIPIF1<0單調(diào)遞減,所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0在SKIPIF1<0上單調(diào)遞減,函數(shù)無(wú)最小值,所以不存在正實(shí)數(shù)SKIPIF1<0,使得SKIPIF1<0恒成立,故C錯(cuò);D:因?yàn)镾KIPIF1<0在SKIPIF1<0上單調(diào)遞減,在SKIPIF1<0上單調(diào)遞增,∴SKIPIF1<0是SKIPIF1<0的極小值點(diǎn),∵對(duì)任意兩個(gè)正實(shí)數(shù)SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0.令SKIPIF1<0,則SKIPIF1<0,由SKIPIF1<0,得SKIPIF1<0,∴SKIPIF1<0,即SKIPIF1<0,即SKIPIF1<0,解得SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0.故要證SKIPIF1<0,需證SKIPIF1<0,需證SKIPIF1<0,需證SKIPIF1<0.∵SKIPIF1<0,則SKIPIF1<0,∴證SKIPIF1<0.令SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0在SKIPIF1<0上是增函數(shù).因?yàn)镾KIPIF1<0時(shí),SKIPIF1<0,則SKIPIF1<0,所以SKIPIF1<0在SKIPIF1<0上是增函數(shù).因?yàn)镾KIPIF1<0時(shí),SKIPIF1<0,則SKIPIF1<0,所以SKIPIF1<0,∴SKIPIF1<0,故D正確,故選BD.第Ⅱ卷(非選擇題)三、填空題:本大題共4小題,每小題5分.13.圣宋元寶,是中國(guó)古代錢幣之一,宋徽宗趙佶建中靖國(guó)元年(公元101年)始鑄,是仁宗“皇宋通寶”之后又一種不以年號(hào)命名的非年號(hào)錢,種類主要有小平和折二兩種.小明同學(xué)珍藏有小平錢2枚,折二錢3枚,現(xiàn)隨機(jī)抽取2枚贈(zèng)好友,則贈(zèng)送的兩枚為不同種類的概率為_________.【答案】SKIPIF1<0【解析】小平錢2枚編號(hào)為SKIPIF1<0,折二錢3枚編號(hào)為SKIPIF1<0,則任取2枚的所有基本事件為SKIPIF1<0共10種,其中兩枚不同類的有SKIPIF1<0共6種,所求概率為SKIPIF1<0,故答案為SKIPIF1<0.14.已知SKIPIF1<0外接圓的直徑為d,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0_________.【答案】SKIPIF1<0【解析】由余弦定理得SKIPIF1<0,所以SKIPIF1<0,由正弦定理得SKIPIF1<0,故答案為SKIPIF1<0.15.設(shè)SKIPIF1<0;SKIPIF1<0,若SKIPIF1<0是SKIPIF1<0的必要不充分條件,則SKIPIF1<0的取值范圍為________.【答案】SKIPIF1<0【解析】設(shè)SKIPIF1<0表示的是集合SKIPIF1<0,SKIPIF1<0表示的是集合SKIPIF1<0,若SKIPIF1<0是SKIPIF1<0的必要不充分條件,則SKIPIF1<0,在坐標(biāo)軸中作出滿足SKIPIF1<0的可行域,如下圖陰影部分所示:由SKIPIF1<0,則結(jié)合上圖可知,點(diǎn)SKIPIF1<0應(yīng)在圓SKIPIF1<0內(nèi)部或者圓上,即SKIPIF1<0,解得SKIPIF1<0,故答案為SKIPIF1<0.16.已知SKIPIF1<0、SKIPIF1<0分別為橢圓SKIPIF1<0的左、右焦點(diǎn),點(diǎn)SKIPIF1<0關(guān)于直線SKIPIF1<0對(duì)稱的點(diǎn)Q在橢圓上,則橢圓的離心率為_________;若過(guò)SKIPIF1<0且斜率為SKIPIF1<0的直線與橢圓相交于AB兩點(diǎn),且SKIPIF1<0,則SKIPIF1<0_________.【答案】SKIPIF1<0,SKIPIF1<0【解析】由于點(diǎn)SKIPIF1<0關(guān)于直線SKIPIF1<0對(duì)稱的點(diǎn)Q在橢圓上,由于SKIPIF1<0的傾斜角為SKIPIF1<0,畫出圖象如下圖所示,由于SKIPIF1<0是坐標(biāo)原點(diǎn),根據(jù)對(duì)稱性和中位線的知識(shí)可知SKIPIF1<0為等腰直角三角形,且SKIPIF1<0為短軸的端點(diǎn),故離心率SKIPIF1<0.不妨設(shè)SKIPIF1<0,SKIPIF1<0,則橢圓方程化為SKIPIF1<0,設(shè)直線SKIPIF1<0的方程為SKIPIF1<0,代入橢圓方程并化簡(jiǎn)得SKIPIF1<0.設(shè)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0①,SKIPIF1<0②.由于SKIPIF1<0,故SKIPIF1<0③.解由①②③組成的方程組得SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0.故答案為SKIPIF1<0,SKIPIF1<0.四、解答題:本大題共6個(gè)大題,共70分,解答應(yīng)寫出文字說(shuō)明、證明過(guò)程或演算步驟.17.(10分)已知數(shù)列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(1)求證:數(shù)列SKIPIF1<0為等差數(shù)列;(2)設(shè)數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和SKIPIF1<0.證明:SKIPIF1<0.【答案】(1)證明見解析;(2)證明見解析.【解析】證明:(1)∵SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0,∴SKIPIF1<0,∴數(shù)列SKIPIF1<0是首項(xiàng)為1,公差為1的等差數(shù)列.(2)由(1)知:SKIPIF1<0,∴SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0,所以SKIPIF1<0.18.(12分)在SKIPIF1<0中,角A,B,C的對(duì)邊分別為SKIPIF1<0,SKIPIF1<0,點(diǎn)D在邊AC上,且SKIPIF1<0,SKIPIF1<0.(1)求角B的大小;(2)求SKIPIF1<0面積的最大值.【答案】(1)SKIPIF1<0;(2)SKIPIF1<0.【解析】(1)由SKIPIF1<0及正弦定理,得SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0,即SKIPIF1<0,因?yàn)镾KIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,又SKIPIF1<0,得SKIPIF1<0.(2)方法1:因?yàn)辄c(diǎn)D在邊AC上,且SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,即SKIPIF1<0,即SKIPIF1<0,由SKIPIF1<0,可得SKIPIF1<0,即SKIPIF1<0,當(dāng)且僅當(dāng)SKIPIF1<0時(shí),等號(hào)成立,所以SKIPIF1<0面積的最大值為SKIPIF1<0,當(dāng)且僅當(dāng)SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0時(shí)等號(hào)成立.方法2.設(shè)SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0,在SKIPIF1<0中,由余弦定理得SKIPIF1<0,即SKIPIF1<0;①同理,在SKIPIF1<0中,由余弦定理得SKIPIF1<0,②由①②消掉SKIPIF1<0,得SKIPIF1<0.③在SKIPIF1<0中,由余弦定理,得SKIPIF1<0,即SKIPIF1<0,④把④代入③,得SKIPIF1<0,由SKIPIF1<0,可得SKIPIF1<0,即SKIPIF1<0,所以SKIPIF1<0面積的最大值為SKIPIF1<0,當(dāng)且僅當(dāng)SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0時(shí)等號(hào)成立.19.(12分)某年某省有40萬(wàn)考生參加高考.已知考試總分為750分,一本院校在該省計(jì)劃招生6萬(wàn)人.經(jīng)考試后統(tǒng)計(jì),考試成績(jī)X服從正態(tài)分布SKIPIF1<0,若以省計(jì)劃招生數(shù)確定一本最低錄取分?jǐn)?shù).(1)已知SKIPIF1<0,則該省這一年的一本最低錄取分?jǐn)?shù)約為多少?(2)某公司為考生制定了如下獎(jiǎng)勵(lì)方案:所有高考成績(jī)不低于一本最低錄取分?jǐn)?shù)的考生均可參加“線上抽獎(jiǎng)送話費(fèi)”活動(dòng),每個(gè)考生只能抽獎(jiǎng)一次.抽獎(jiǎng)?wù)唿c(diǎn)擊抽獎(jiǎng)按鈕,即隨機(jī)產(chǎn)生一個(gè)兩位數(shù)(10,11,…,99),若產(chǎn)生的兩位數(shù)字相同,則可獎(jiǎng)勵(lì)20元話費(fèi),否則獎(jiǎng)勵(lì)5元,假如所有符合條件的考生均參加抽獎(jiǎng)活動(dòng),估計(jì)這次活動(dòng)獎(jiǎng)勵(lì)的話費(fèi)總額是多少?【答案】(1)456分;(2)39萬(wàn)元.【解析】(1)X服從正態(tài)分布:SKIPIF1<0,因?yàn)镾KIPIF1<0,SKIPIF1<0;所以SKIPIF1<0,根據(jù)正態(tài)曲線的對(duì)稱性,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,若40萬(wàn)考生中一本院校招收6萬(wàn)考生,則一本院??忌急葹镾KIPIF1<0,所以這一年一本最低錄取分?jǐn)?shù)為456分.(2)X的分布列如下:X205P0SKIPIF1<010SKIPIF1<09所以SKIPIF1<0,因?yàn)橐槐驹盒U猩还?萬(wàn)人,每人的話費(fèi)期望值為6SKIPIF1<05元,故總額為SKIPIF1<0萬(wàn)元.20.(12分)如圖,SKIPIF1<0,SKIPIF1<0分別是圓臺(tái)上下底面的圓心,SKIPIF1<0是下底面圓的直徑,SKIPIF1<0,點(diǎn)SKIPIF1<0是下底面內(nèi)以SKIPIF1<0為直徑的圓上的一個(gè)動(dòng)點(diǎn)(點(diǎn)SKIPIF1<0不在SKIPIF1<0上).(1)求證:平面SKIPIF1<0平面SKIPIF1<0;(2)若SKIPIF1<0,SKIPIF1<0,求二面角SKIPIF1<0的余弦值.【答案】(1)證明見解析;(2)SKIPIF1<0.【解析】(1)由題意,SKIPIF1<0,SKIPIF1<0分別是圓臺(tái)上下底面的圓心,可得SKIPIF1<0底面SKIPIF1<0,因?yàn)镾KIPIF1<0底面SKIPIF1<0,所以SKIPIF1<0,又由點(diǎn)SKIPIF1<0是下底面內(nèi)以SKIPIF1<0為直徑的圓上的一個(gè)動(dòng)點(diǎn),可得SKIPIF1<0,又因?yàn)镾KIPIF1<0,且SKIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0平面SKIPIF1<0,因?yàn)镾KIPIF1<0平面SKIPIF1<0,所以平面SKIPIF1<0平面SKIPIF1<0.(2)以SKIPIF1<0為原點(diǎn),建立空間直角坐標(biāo)系,如圖所示,因?yàn)镾KIPIF1<0,則SKIPIF1<0,SKIPIF1<0,可得SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,設(shè)平面SKIPIF1<0的法向量為SKIPIF1<0,則SKIPIF1<0,即SKIPIF1<0,令SKIPIF1<0,可得SKIPIF1<0,所以SKIPIF1<
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