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新高考數(shù)學(xué)考前模擬卷注意事項(xiàng):本試卷滿分150分,考試時(shí)間120分鐘.答卷前,考生務(wù)必用0.5毫米黑色簽字筆將自己的姓名、班級(jí)等信息填寫(xiě)在試卷規(guī)定的位置.單項(xiàng)選擇題(本大題共8小題,每小題5分,共40分)1.(2020·河南高三月考(理))已知復(fù)數(shù)SKIPIF1<0為純虛數(shù),則復(fù)數(shù)SKIPIF1<0的模等于()A.SKIPIF1<0 B.SKIPIF1<0 C.1 D.22.(2020·黑龍江哈爾濱市·哈師大附中高三期中(理))設(shè)集合SKIPIF1<0,集合SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2020·全國(guó)高三專題練習(xí))如果甲是乙的充要條件,丙是乙的充分條件但不是乙的必要條件,那么()A.丙是甲的充分條件,但不是甲的必要條件B.丙是甲的必要條件,但不是甲的充分條件C.丙是甲的充要條件D.丙既不是甲的充分條件,也不是甲的必要條件4.(2020·四川遂寧市·高三零模(文))已知SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<05.(2020·廣西高三其他模擬(理))在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.2 B.SKIPIF1<0 C.SKIPIF1<0 D.36.(2020·全國(guó)高三其他模擬)已知SKIPIF1<0為SKIPIF1<0的外接圓圓心,且SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.27.(2020·北京人大附中高三三模)等比數(shù)列SKIPIF1<0中SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數(shù)列,則SKIPIF1<0的最小值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.18.(2020·浙江鎮(zhèn)海區(qū)·鎮(zhèn)海中學(xué)高三其他模擬)若實(shí)數(shù)a,b滿足SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0多項(xiàng)選擇題(本大題共4小題,每小題5分,共20分.全部選對(duì)的得5分,部分選對(duì)的得3分,有選錯(cuò)的得0分)9.(2020·江蘇海安市·高三期中)下列四個(gè)函數(shù)中,以SKIPIF1<0為周期,且在區(qū)間SKIPIF1<0上單調(diào)遞減的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.(2020·福清西山學(xué)校高三期中)已知SKIPIF1<0是面積為SKIPIF1<0的等邊三角形,且其頂點(diǎn)都在球SKIPIF1<0的球面上.若球SKIPIF1<0的表面積為SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0與平面SKIPIF1<0所成的角為SKIPIF1<0C.SKIPIF1<0到平面SKIPIF1<0的距離為1 D.二面角SKIPIF1<0的大小為SKIPIF1<011.(2020·河北桃城區(qū)·衡水中學(xué)高三月考)如圖為某市2020年國(guó)慶節(jié)7天假期的樓房認(rèn)購(gòu)量與成交量的折線圖,小明同學(xué)根據(jù)折線圖對(duì)這7天的認(rèn)購(gòu)量(單位:套)與成交量(單位:套)作出如下判斷,則判斷錯(cuò)誤的為()A.日成交量的中位數(shù)是16B.日成交量超過(guò)日平均成交量的有2天C.10月7日認(rèn)購(gòu)量的增幅大于10月7日成交量的增幅D.日認(rèn)購(gòu)量的方差大于日成交量的方差12.(2020·大名縣第一中學(xué)高二月考)已知圓SKIPIF1<0為圓SKIPIF1<0上的兩個(gè)動(dòng)點(diǎn),且SKIPIF1<0為弦SKIPIF1<0的中點(diǎn)SKIPIF1<0,SKIPIF1<0.當(dāng)SKIPIF1<0在圓SKIPIF1<0上運(yùn)動(dòng)時(shí),始終有SKIPIF1<0為銳角,則實(shí)數(shù)SKIPIF1<0的可能取值為()A.-3 B.-2 C.0 D.1填空題(本大題共4小題,每小題5分,共20分)13.(2020·四川綿陽(yáng)市·高二期末(理))某學(xué)校甲?乙?丙?丁4位同學(xué)住在同-一個(gè)小區(qū).已知從學(xué)校到小區(qū)有SKIPIF1<0?SKIPIF1<0?SKIPIF1<0三條線路的公共汽車(chē),若他們放學(xué)后每位同學(xué)乘坐其中任何一條線路的公共汽車(chē)回家是等可能性的,則這4位同學(xué)中恰有2人乘坐SKIPIF1<0線路公共汽車(chē)的概率為_(kāi)______.14.(2020·全國(guó)高三其他模擬(文))已知圓SKIPIF1<0與雙曲線SKIPIF1<0的漸近線相切,則SKIPIF1<0的離心率為_(kāi)_____.15.(2020·河南高三其他模擬(理))已知函數(shù)SKIPIF1<0,若關(guān)于SKIPIF1<0的方程SKIPIF1<0有5個(gè)不同的實(shí)數(shù)解,則實(shí)數(shù)SKIPIF1<0的取值范圍是______.16.(2020·海南高三一模)粽子古稱“角黍”,是中國(guó)傳統(tǒng)的節(jié)慶食品之一,由粽葉包裹糯米等食材蒸制而成.因各地風(fēng)俗不同,粽子的形狀和味道也不同,某地流行的“五角粽子”,其形狀可以看成所有棱長(zhǎng)均為SKIPIF1<0的正四棱錐,則這個(gè)粽子的表面積為_(kāi)_____SKIPIF1<0,現(xiàn)在需要在粽子內(nèi)部放入一顆咸蛋黃,蛋黃的形狀近似地看成球,則當(dāng)這個(gè)蛋黃的體積最大時(shí),其半徑與正四棱錐的高的比值為_(kāi)_____.四、解答題(本大題共6小題,共70分)17.(2020·上海高三一模)設(shè)SKIPIF1<0為常數(shù),函數(shù)SKIPIF1<0(SKIPIF1<0)(1)設(shè)SKIPIF1<0,求函數(shù)SKIPIF1<0的單調(diào)遞增區(qū)間及頻率SKIPIF1<0;(2)若函數(shù)SKIPIF1<0為偶函數(shù),求此函數(shù)的值域.18.(2020·福建廈門(mén)市·廈門(mén)雙十中學(xué)高三期中)在①SKIPIF1<0;②SKIPIF1<0;③SKIPIF1<0(SKIPIF1<0)三個(gè)條件中任選一個(gè),補(bǔ)充在下面問(wèn)題中,并求解.問(wèn)題:已知數(shù)列SKIPIF1<0中,SKIPIF1<0,__________.(1)求SKIPIF1<0;(2)若數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,證明:SKIPIF1<0.19.(2020·貴州安順市·高三其他模擬(文))如圖所示,在四棱錐SKIPIF1<0中,側(cè)面SKIPIF1<0是邊長(zhǎng)為2正三角形,且與底面垂直,底面SKIPIF1<0是SKIPIF1<0的菱形.

(1)證明:SKIPIF1<0;(2)求點(diǎn)SKIPIF1<0到SKIPIF1<0的距離.20.(2020·全國(guó)高三其他模擬)根據(jù)海關(guān)總署發(fā)布的2020年上半年中國(guó)外貿(mào)進(jìn)出口數(shù)據(jù)顯示,中國(guó)外貿(mào)進(jìn)出口好于預(yù)期,6月份出口?進(jìn)口雙雙實(shí)現(xiàn)正增長(zhǎng),上半年,民營(yíng)企業(yè)進(jìn)出口逆勢(shì)增長(zhǎng),一般貿(mào)易進(jìn)出口比重提升.某公司抓住機(jī)遇,不斷加大科技攻關(guān)投入,提升產(chǎn)品質(zhì)量,據(jù)統(tǒng)計(jì)該公司SKIPIF1<0,SKIPIF1<0兩類產(chǎn)品2020年1~6月份的盈利情況如表:月份代碼SKIPIF1<0123456產(chǎn)品類型SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0盈利/萬(wàn)元605060708575807090110110100(1)從統(tǒng)計(jì)的這6個(gè)月份中任取3個(gè)月份,求SKIPIF1<0產(chǎn)品盈利高于SKIPIF1<0產(chǎn)品盈利的月份數(shù)SKIPIF1<0的分布列及數(shù)學(xué)期望;(2)已知可用線性回歸模型擬合兩類產(chǎn)品的盈利之和SKIPIF1<0(單位:萬(wàn)元)與月份代碼SKIPIF1<0之間的關(guān)系,試求SKIPIF1<0關(guān)于SKIPIF1<0的線性回歸方程,并預(yù)測(cè)該公司2020年11月份兩類產(chǎn)品的盈利之和.參考公式:回歸方程SKIPIF1<0中斜率和截距的最小二乘估計(jì)公式分別為SKIPIF1<0,SKIPIF1<0.21.(2020·江西高三零模(理))已知SKIPIF1<0,SKIPIF1<0是橢圓SKIPIF1<0的左、右焦點(diǎn),圓SKIPIF1<0SKIPIF1<0與橢圓有且僅有兩個(gè)交點(diǎn),點(diǎn)SKIPIF1<0在橢圓上.(1)求橢圓的標(biāo)準(zhǔn)方程;(2)過(guò)y正半軸上一點(diǎn)P的直線l與圓O相切,與橢圓C交于點(diǎn)A,B,若SKIPIF1<0,求直線l的方程.22.(2020·安徽高三二模(理))已知函數(shù)SKIPIF1<0.(1)討論函數(shù)SKIPIF1<0的單調(diào)性;(2)若函數(shù)SKIPIF1<0存在兩個(gè)極值點(diǎn)SKIPIF1<0,SKIPIF1<0,求證:SKIPIF1<0.新高考數(shù)學(xué)考前模擬卷注意事項(xiàng):本試卷滿分150分,考試時(shí)間120分鐘.答卷前,考生務(wù)必用0.5毫米黑色簽字筆將自己的姓名、班級(jí)等信息填寫(xiě)在試卷規(guī)定的位置.單項(xiàng)選擇題(本大題共8小題,每小題5分,共40分)1.(2020·河南高三月考(理))已知復(fù)數(shù)SKIPIF1<0為純虛數(shù),則復(fù)數(shù)SKIPIF1<0的模等于()A.SKIPIF1<0 B.SKIPIF1<0 C.1 D.2【答案】D【詳解】SKIPIF1<0,因?yàn)閺?fù)數(shù)SKIPIF1<0為純虛數(shù),所以SKIPIF1<0,解得SKIPIF1<0,SKIPIF1<0,SKIPIF1<0故選:D.2.(2020·黑龍江哈爾濱市·哈師大附中高三期中(理))設(shè)集合SKIPIF1<0,集合SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】C【詳解】∵SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0.故選:C.3.(2020·全國(guó)高三專題練習(xí))如果甲是乙的充要條件,丙是乙的充分條件但不是乙的必要條件,那么()A.丙是甲的充分條件,但不是甲的必要條件B.丙是甲的必要條件,但不是甲的充分條件C.丙是甲的充要條件D.丙既不是甲的充分條件,也不是甲的必要條件【答案】A【詳解】因?yàn)榧资且业某湟獥l件,所以甲SKIPIF1<0乙,乙SKIPIF1<0甲;又因?yàn)楸且业某浞謼l件,但不是乙的必要條件,所以丙SKIPIF1<0乙,但乙SKIPIF1<0丙.綜上所述:丙SKIPIF1<0乙,乙SKIPIF1<0甲,所以丙SKIPIF1<0甲,又因?yàn)榧譙KIPIF1<0乙,乙SKIPIF1<0丙,所以甲SKIPIF1<0丙,根據(jù)充分條件和必要條件的定義可得丙是甲的充分條件,但不是甲的必要條件,所以選項(xiàng)A正確,選項(xiàng)BCD都不正確,故選:A4.(2020·四川遂寧市·高三零模(文))已知SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0【答案】C【詳解】因?yàn)镾KIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,故選:C.5.(2020·廣西高三其他模擬(理))在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.2 B.SKIPIF1<0 C.SKIPIF1<0 D.3【答案】C【詳解】解:SKIPIF1<0,∴可得SKIPIF1<0.SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,∴由正弦定理SKIPIF1<0,可得:SKIPIF1<0,解得SKIPIF1<0.故選:C.6.(2020·全國(guó)高三其他模擬)已知SKIPIF1<0為SKIPIF1<0的外接圓圓心,且SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.2【答案】C【詳解】如圖,SKIPIF1<0,SKIPIF1<0,由SKIPIF1<0為SKIPIF1<0的外心,得向量SKIPIF1<0在向量SKIPIF1<0方向上的投影為SKIPIF1<0,向量SKIPIF1<0在向量SKIPIF1<0方向上的投影為SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0,從而SKIPIF1<0,即SKIPIF1<0,因而SKIPIF1<0.故選:C.7.(2020·北京人大附中高三三模)等比數(shù)列SKIPIF1<0中SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數(shù)列,則SKIPIF1<0的最小值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.1【答案】D【詳解】在等比數(shù)列SKIPIF1<0中,設(shè)公比SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),有SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數(shù)列,所以SKIPIF1<0,即SKIPIF1<0,解得SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,當(dāng)且僅當(dāng)SKIPIF1<0時(shí)取等號(hào),所以當(dāng)SKIPIF1<0或SKIPIF1<0時(shí),SKIPIF1<0取得最小值1,故選:D.8.(2020·浙江鎮(zhèn)海區(qū)·鎮(zhèn)海中學(xué)高三其他模擬)若實(shí)數(shù)a,b滿足SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】A【詳解】由題得SKIPIF1<0,所以SKIPIF1<0當(dāng)且僅當(dāng)SKIPIF1<0時(shí)取等.令SKIPIF1<0,則SKIPIF1<0,所以SKIPIF1<0,所以函數(shù)在SKIPIF1<0單調(diào)遞增,在SKIPIF1<0單調(diào)遞減.所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0.所以SKIPIF1<0.故選:A.多項(xiàng)選擇題(本大題共4小題,每小題5分,共20分.全部選對(duì)的得5分,部分選對(duì)的得3分,有選錯(cuò)的得0分)9.(2020·江蘇海安市·高三期中)下列四個(gè)函數(shù)中,以SKIPIF1<0為周期,且在區(qū)間SKIPIF1<0上單調(diào)遞減的是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【答案】AC【詳解】SKIPIF1<0最小正周期為SKIPIF1<0,在區(qū)間SKIPIF1<0上單調(diào)遞減;SKIPIF1<0最小正周期為SKIPIF1<0,在區(qū)間SKIPIF1<0上單調(diào)遞增;SKIPIF1<0最小正周期為SKIPIF1<0,在區(qū)間SKIPIF1<0上單調(diào)遞減;SKIPIF1<0不是周期函數(shù),在區(qū)間SKIPIF1<0上單調(diào)遞減;故選:AC10.(2020·福清西山學(xué)校高三期中)已知SKIPIF1<0是面積為SKIPIF1<0的等邊三角形,且其頂點(diǎn)都在球SKIPIF1<0的球面上.若球SKIPIF1<0的表面積為SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0與平面SKIPIF1<0所成的角為SKIPIF1<0C.SKIPIF1<0到平面SKIPIF1<0的距離為1 D.二面角SKIPIF1<0的大小為SKIPIF1<0【答案】ABC【詳解】如圖,因?yàn)镾KIPIF1<0的頂點(diǎn)都在球SKIPIF1<0的球面上,且SKIPIF1<0是等邊三角形,過(guò)SKIPIF1<0作SKIPIF1<0平面SKIPIF1<0于點(diǎn)SKIPIF1<0,則點(diǎn)SKIPIF1<0是等邊SKIPIF1<0的中心,也是外心,重心因?yàn)镾KIPIF1<0是面積為SKIPIF1<0的等邊三角形,所以SKIPIF1<0,解得SKIPIF1<0,延長(zhǎng)SKIPIF1<0交SKIPIF1<0于點(diǎn)SKIPIF1<0,則點(diǎn)SKIPIF1<0是SKIPIF1<0的中點(diǎn),因?yàn)镾KIPIF1<0,所以SKIPIF1<0,又因?yàn)镾KIPIF1<0平面SKIPIF1<0,SKIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0平面SKIPIF1<0,又因?yàn)镾KIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0,故選項(xiàng)A正確;因?yàn)榍騍KIPIF1<0的表面積為SKIPIF1<0,即SKIPIF1<0,所以SKIPIF1<0,即SKIPIF1<0,因?yàn)榈冗匰KIPIF1<0中,SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,在直角三角形SKIPIF1<0中,SKIPIF1<0,所以SKIPIF1<0到平面SKIPIF1<0的距離為1,故選項(xiàng)C正確;因?yàn)镾KIPIF1<0平面SKIPIF1<0于點(diǎn)SKIPIF1<0,所以SKIPIF1<0即為SKIPIF1<0與平面SKIPIF1<0所成的角,在直角三角形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,故選項(xiàng)B正確;取SKIPIF1<0的中點(diǎn)SKIPIF1<0連接SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,因?yàn)镾KIPIF1<0平面SKIPIF1<0,SKIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0平面SKIPIF1<0,所以SKIPIF1<0,結(jié)合SKIPIF1<0,可得SKIPIF1<0即為二面角SKIPIF1<0的平面角,由SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,故選項(xiàng)D不正確.故選:ABC11.(2020·河北桃城區(qū)·衡水中學(xué)高三月考)如圖為某市2020年國(guó)慶節(jié)7天假期的樓房認(rèn)購(gòu)量與成交量的折線圖,小明同學(xué)根據(jù)折線圖對(duì)這7天的認(rèn)購(gòu)量(單位:套)與成交量(單位:套)作出如下判斷,則判斷錯(cuò)誤的為()A.日成交量的中位數(shù)是16B.日成交量超過(guò)日平均成交量的有2天C.10月7日認(rèn)購(gòu)量的增幅大于10月7日成交量的增幅D.日認(rèn)購(gòu)量的方差大于日成交量的方差【答案】ABC【詳解】7天假期的樓房認(rèn)購(gòu)量為:91、100、105、107、112、223、276;成交量為:8、13、16、26、32、38、166.對(duì)于A,日成交量的中位數(shù)是26,故A錯(cuò)誤;對(duì)于B,因?yàn)槿掌骄山涣繛镾KIPIF1<0,日成交量超過(guò)日平均成交量的只有10月7日1天,故B錯(cuò)誤;對(duì)于C,10月7日認(rèn)購(gòu)量的增幅為SKIPIF1<0,10月7日成交量的增幅為SKIPIF1<0,即10月7日認(rèn)購(gòu)量的增幅小于10月7日成交量的增幅,故C錯(cuò)誤;對(duì)于D,因?yàn)槿照J(rèn)購(gòu)量的數(shù)據(jù)分布較分散些,方差大些,故D正確.故選:ABC12.(2020·大名縣第一中學(xué)高二月考)已知圓SKIPIF1<0為圓SKIPIF1<0上的兩個(gè)動(dòng)點(diǎn),且SKIPIF1<0為弦SKIPIF1<0的中點(diǎn)SKIPIF1<0,SKIPIF1<0.當(dāng)SKIPIF1<0在圓SKIPIF1<0上運(yùn)動(dòng)時(shí),始終有SKIPIF1<0為銳角,則實(shí)數(shù)SKIPIF1<0的可能取值為()A.-3 B.-2 C.0 D.1【答案】AD【詳解】圓SKIPIF1<0的圓心為SKIPIF1<0,半徑為SKIPIF1<0.SKIPIF1<0為SKIPIF1<0的中點(diǎn),SKIPIF1<0,所以SKIPIF1<0,設(shè)SKIPIF1<0,則SKIPIF1<0,所以點(diǎn)SKIPIF1<0的軌跡方程為SKIPIF1<0.即SKIPIF1<0在圓心為SKIPIF1<0,半徑為SKIPIF1<0的圓上.SKIPIF1<0,SKIPIF1<0都在直線SKIPIF1<0上,且SKIPIF1<0,設(shè)線段SKIPIF1<0的中點(diǎn)為SKIPIF1<0,則SKIPIF1<0,以SKIPIF1<0為圓心,半徑為SKIPIF1<0的圓與圓SKIPIF1<0外離時(shí),始終有SKIPIF1<0為銳角,所以SKIPIF1<0,即SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0或SKIPIF1<0,即SKIPIF1<0或SKIPIF1<0.所以AD選項(xiàng)正確.故選:AD填空題(本大題共4小題,每小題5分,共20分)13.(2020·四川綿陽(yáng)市·高二期末(理))某學(xué)校甲?乙?丙?丁4位同學(xué)住在同-一個(gè)小區(qū).已知從學(xué)校到小區(qū)有SKIPIF1<0?SKIPIF1<0?SKIPIF1<0三條線路的公共汽車(chē),若他們放學(xué)后每位同學(xué)乘坐其中任何一條線路的公共汽車(chē)回家是等可能性的,則這4位同學(xué)中恰有2人乘坐SKIPIF1<0線路公共汽車(chē)的概率為_(kāi)______.【答案】SKIPIF1<0【詳解】SKIPIF1<0位同學(xué)放學(xué)后乘坐公共汽車(chē)的情況為:SKIPIF1<0(種);SKIPIF1<0位同學(xué)中恰有SKIPIF1<0人乘坐SKIPIF1<0線路的情況為:SKIPIF1<0(種);則SKIPIF1<0位同學(xué)中恰有SKIPIF1<0人乘坐A線路的概率為:SKIPIF1<0.故答案為:SKIPIF1<014.(2020·全國(guó)高三其他模擬(文))已知圓SKIPIF1<0與雙曲線SKIPIF1<0的漸近線相切,則SKIPIF1<0的離心率為_(kāi)_____.【答案】SKIPIF1<0【詳解】由SKIPIF1<0得SKIPIF1<0,所以圓心SKIPIF1<0,半徑SKIPIF1<0,雙曲線SKIPIF1<0的一條漸近線為SKIPIF1<0,由題意得圓心到漸近線的距離SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,所以SKIPIF1<0,故答案為:SKIPIF1<0,15.(2020·河南高三其他模擬(理))已知函數(shù)SKIPIF1<0,若關(guān)于SKIPIF1<0的方程SKIPIF1<0有5個(gè)不同的實(shí)數(shù)解,則實(shí)數(shù)SKIPIF1<0的取值范圍是______.【答案】SKIPIF1<0【詳解】設(shè)SKIPIF1<0,則SKIPIF1<0,由SKIPIF1<0,解得SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,函數(shù)為增函數(shù),當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,函數(shù)為減函數(shù).SKIPIF1<0當(dāng)SKIPIF1<0時(shí),函數(shù)取得極大值也是最大值為SKIPIF1<0(SKIPIF1<0)SKIPIF1<0.方程SKIPIF1<0化為SKIPIF1<0.解得SKIPIF1<0或SKIPIF1<0.如圖畫(huà)出函數(shù)圖象:可得SKIPIF1<0的取值范圍是SKIPIF1<0.故答案為:SKIPIF1<016.(2020·海南高三一模)粽子古稱“角黍”,是中國(guó)傳統(tǒng)的節(jié)慶食品之一,由粽葉包裹糯米等食材蒸制而成.因各地風(fēng)俗不同,粽子的形狀和味道也不同,某地流行的“五角粽子”,其形狀可以看成所有棱長(zhǎng)均為SKIPIF1<0的正四棱錐,則這個(gè)粽子的表面積為_(kāi)_____SKIPIF1<0,現(xiàn)在需要在粽子內(nèi)部放入一顆咸蛋黃,蛋黃的形狀近似地看成球,則當(dāng)這個(gè)蛋黃的體積最大時(shí),其半徑與正四棱錐的高的比值為_(kāi)_____.【答案】SKIPIF1<0SKIPIF1<0【詳解】每個(gè)側(cè)面三角形的面積均為SKIPIF1<0,底面正方形的面積為SKIPIF1<0,所以四棱錐的表面積為SKIPIF1<0;球的體積要達(dá)到最大,則需要球與四棱錐五個(gè)面都相切,正四棱錐的高為SKIPIF1<0,設(shè)球的半徑為SKIPIF1<0,所以四棱錐的體積SKIPIF1<0,故SKIPIF1<0,SKIPIF1<0.故答案為:SKIPIF1<0;SKIPIF1<0四、解答題(本大題共6小題,共70分)17.(2020·上海高三一模)設(shè)SKIPIF1<0為常數(shù),函數(shù)SKIPIF1<0(SKIPIF1<0)(1)設(shè)SKIPIF1<0,求函數(shù)SKIPIF1<0的單調(diào)遞增區(qū)間及頻率SKIPIF1<0;(2)若函數(shù)SKIPIF1<0為偶函數(shù),求此函數(shù)的值域.【答案】(1)增區(qū)間為SKIPIF1<0,頻率SKIPIF1<0;(2)SKIPIF1<0.【詳解】(1)當(dāng)SKIPIF1<0時(shí),函數(shù)SKIPIF1<0,令SKIPIF1<0,得SKIPIF1<0,所以此函數(shù)的單調(diào)遞增區(qū)間為SKIPIF1<0,又由函數(shù)的SKIPIF1<0的最小正周期為SKIPIF1<0,所以SKIPIF1<0SKIPIF1<0.(2)由題意,函數(shù)SKIPIF1<0定義域SKIPIF1<0,因?yàn)楹瘮?shù)SKIPIF1<0為偶函數(shù),所以對(duì)于任意的SKIPIF1<0,均有SKIPIF1<0成立,即SKIPIF1<0,即SKIPIF1<0對(duì)于任意實(shí)數(shù)SKIPIF1<0均成立,只有SKIPIF1<0,此時(shí)SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,故此函數(shù)的值域?yàn)镾KIPIF1<0.18.(2020·福建廈門(mén)市·廈門(mén)雙十中學(xué)高三期中)在①SKIPIF1<0;②SKIPIF1<0;③SKIPIF1<0(SKIPIF1<0)三個(gè)條件中任選一個(gè),補(bǔ)充在下面問(wèn)題中,并求解.問(wèn)題:已知數(shù)列SKIPIF1<0中,SKIPIF1<0,__________.(1)求SKIPIF1<0;(2)若數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,證明:SKIPIF1<0.【答案】(1)SKIPIF1<0;(2)證明見(jiàn)解析.【詳解】(1)選①:由SKIPIF1<0可得SKIPIF1<0,即SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0是首項(xiàng)為4,公差為4的等差數(shù)列,所以SKIPIF1<0,所以SKIPIF1<0;選②:由SKIPIF1<0,SKIPIF1<0可得SKIPIF1<0,即SKIPIF1<0,又SKIPIF1<0,所以SKIPIF1<0是首項(xiàng)為2,公差為2的等差數(shù)列,所以SKIPIF1<0,所以SKIPIF1<0;選③:由SKIPIF1<0(SKIPIF1<0)可得:

當(dāng)SKIPIF1<0時(shí),SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0,

當(dāng)SKIPIF1<0時(shí),SKIPIF1<0,符合SKIPIF1<0,

所以當(dāng)SKIPIF1<0時(shí),SKIPIF1<0;(2)證明:由(1)得SKIPIF1<0,所以SKIPIF1<0SKIPIF1<0SKIPIF1<0,因?yàn)镾KIPIF1<0,所以SKIPIF1<0,又因?yàn)镾KIPIF1<0隨著SKIPIF1<0的增大而增大,所以SKIPIF1<0,綜上SKIPIF1<0.19.(2020·貴州安順市·高三其他模擬(文))如圖所示,在四棱錐SKIPIF1<0中,側(cè)面SKIPIF1<0是邊長(zhǎng)為2正三角形,且與底面垂直,底面SKIPIF1<0是SKIPIF1<0的菱形.

(1)證明:SKIPIF1<0;(2)求點(diǎn)SKIPIF1<0到SKIPIF1<0的距離.【答案】(1)證明見(jiàn)解析;(2)SKIPIF1<0.【詳解】(1)如圖所示取SKIPIF1<0中點(diǎn)為SKIPIF1<0,連接SKIPIF1<0,∵SKIPIF1<0均為正角形,∴SKIPIF1<0.∴SKIPIF1<0,又SKIPIF1<0,∴SKIPIF1<0平面SKIPIF1<0.又∵SKIPIF1<0平面SKIPIF1<0,∴SKIPIF1<0.(2)∵面SKIPIF1<0面SKIPIF1<0,面SKIPIF1<0面SKIPIF1<0,SKIPIF1<0,∴SKIPIF1<0面SKIPIF1<0,∴SKIPIF1<0,∴SKIPIF1<0,∴SKIPIF1<0,∴SKIPIF1<0,設(shè)SKIPIF1<0到平面SKIPIF1<0的距離為SKIPIF1<0,則SKIPIF1<0,∴SKIPIF1<0,∴SKIPIF1<0到平面SKIPIF1<0的距離為SKIPIF1<0.20.(2020·全國(guó)高三其他模擬)根據(jù)海關(guān)總署發(fā)布的2020年上半年中國(guó)外貿(mào)進(jìn)出口數(shù)據(jù)顯示,中國(guó)外貿(mào)進(jìn)出口好于預(yù)期,6月份出口?進(jìn)口雙雙實(shí)現(xiàn)正增長(zhǎng),上半年,民營(yíng)企業(yè)進(jìn)出口逆勢(shì)增長(zhǎng),一般貿(mào)易進(jìn)出口比重提升.某公司抓住機(jī)遇,不斷加大科技攻關(guān)投入,提升產(chǎn)品質(zhì)量,據(jù)統(tǒng)計(jì)該公司SKIPIF1<0,SKIPIF1<0兩類產(chǎn)品2020年1~6月份的盈利情況如表:月份代碼SKIPIF1<0123456產(chǎn)品類型SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0盈利/萬(wàn)元605060708575807090110110100(1)從統(tǒng)計(jì)的這6個(gè)月份中任取3個(gè)月份,求SKIPIF1<0產(chǎn)品盈利高于SKIPIF1<0產(chǎn)品盈利的月份數(shù)SKIPIF1<0的分布列及數(shù)學(xué)期望;(2)已知可用線性回歸模型擬合兩類產(chǎn)品的盈利之和SKIPIF1<0(單位:萬(wàn)元)與月份代碼SKIPIF1<0之間的關(guān)系,試求SKIPIF1<0關(guān)于SKIPIF1<0的線性回歸方程,并預(yù)測(cè)該公司2020年11月份兩類產(chǎn)品的盈利之和.參考公式:回歸方程SKIPIF1<0中斜率和截距的最小二乘估計(jì)公式分別為SKIPIF1<0,SKIPIF1<0.【答案】(1)分布列答案見(jiàn)解析,數(shù)學(xué)期望:SKIPIF1<0;(2)線性回歸方程為SKIPIF1<0,預(yù)測(cè)該公司2020年11月份兩類產(chǎn)品的盈利之和為310萬(wàn)元.【詳解】(1)由統(tǒng)計(jì)數(shù)據(jù)可知,這6個(gè)月份中,SKIPIF1<0產(chǎn)品盈利高于SKIPIF1<0產(chǎn)品盈利的月份有SKIPIF1<0,則SKIPIF1<0的可能取值為SKIPIF1<0,SKIPIF1<0;SKIPIF1<0;SKIPIF1<0.故SKIPIF1<0的分布列為SKIPIF1<0123SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0故SKIPIF1<0.(2)由題意可得:月份代碼SKIPIF1<0123456兩類產(chǎn)品的盈利之和SKIPIF1<0/萬(wàn)元110130160150200210故SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0SKIPIF1<0SKIPIF1<0,SKIPIF1<0,所以SKIPIF1<0,∴SKIPIF1<0.所以兩類產(chǎn)品的盈利之和SKIPIF1<0與月份代碼SKIPIF1<0之間的線性回歸方程為SKIPIF1<0,當(dāng)SKIPIF1<0時(shí),SKIPIF1<0.故預(yù)測(cè)該公司2020年11月份兩類產(chǎn)品的盈利之和為310萬(wàn)元.21.(2020·江西高三零模(理))已知SKIPIF1<0,SKIPIF1<0是橢圓SKIPIF1<0的左、右焦點(diǎn),圓SKIPIF1<0SKIPIF1<0與橢圓有且僅有兩個(gè)交點(diǎn),點(diǎn)SKIPIF1<0在橢圓上.(1)求橢圓的標(biāo)準(zhǔn)方程;(2)過(guò)y正半軸上一點(diǎn)P的直線l與圓O相切,與橢圓C交于點(diǎn)A,B,若SKIPIF1<0,求直線l的方程.【答案】(1)SKIPIF1<0;(2)SKIPIF

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