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專(zhuān)題5-1平面向量中的高頻小題歸類(lèi)目錄TOC\o"1-1"\h\u專(zhuān)題5-1平面向量中的高頻小題歸類(lèi) 1 1題型一:平面向量的線性運(yùn)算 1題型二:向量數(shù)量積問(wèn)題(含最值,范圍問(wèn)題) 4題型三:向量的夾角 7題型四:向量模(含最值,范圍問(wèn)題) 8題型五:平面向量的平行與垂直問(wèn)題 10題型六:三點(diǎn)共線的等價(jià)關(guān)系 11 14一、單選題 14二、多選題 16三、填空題 16四、雙空題 16題型一:平面向量的線性運(yùn)算【典例分析】例題1.(2022·河南開(kāi)封·一模(文))已知SKIPIF1<0中,SKIPIF1<0為SKIPIF1<0邊上一點(diǎn),且SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題2.(2022·河南新鄉(xiāng)·一模(理))在△SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0分別為邊SKIPIF1<0,SKIPIF1<0的中點(diǎn),且SKIPIF1<0與SKIPIF1<0交于點(diǎn)SKIPIF1<0,記SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題3.(2022·四川資陽(yáng)·一模(理))如圖,SKIPIF1<0,SKIPIF1<0為以SKIPIF1<0的直徑的半圓的兩個(gè)三等分點(diǎn),SKIPIF1<0為線段SKIPIF1<0的中點(diǎn),SKIPIF1<0為SKIPIF1<0的中點(diǎn),設(shè)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【提分秘籍】平面向量的線性運(yùn)算主要工具是向量的加,減法:向量加法法則:①三角形法則(首尾相接,首尾連):SKIPIF1<0.②平行四邊形法則(作平移,共起點(diǎn),四邊形,對(duì)角線):SKIPIF1<0向量減法法則:(共起點(diǎn),連終點(diǎn),指向被減向量)SKIPIF1<0【變式演練】1.(2022·河北容城中學(xué)模擬預(yù)測(cè))在平行四邊形SKIPIF1<0中,SKIPIF1<0分別是SKIPIF1<0的中點(diǎn),SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·吉林市教育學(xué)院模擬預(yù)測(cè)(理))如圖,SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,點(diǎn)E是SKIPIF1<0的三等分點(diǎn)SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·寧夏·石嘴山市第三中學(xué)模擬預(yù)測(cè)(理))在等邊SKIPIF1<0中,O為重心,D是SKIPIF1<0的中點(diǎn),則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·全國(guó)·模擬預(yù)測(cè)(理))在SKIPIF1<0中,D為AC的中點(diǎn),SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0題型二:向量數(shù)量積問(wèn)題(含最值,范圍問(wèn)題)【典例分析】例題1.(2022·湖南·模擬預(yù)測(cè))已知直線SKIPIF1<0與圓SKIPIF1<0:SKIPIF1<0相交于不同兩點(diǎn)SKIPIF1<0,SKIPIF1<0,點(diǎn)SKIPIF1<0為線段SKIPIF1<0的中點(diǎn),若平面上一動(dòng)點(diǎn)SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0的取值范圍是(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0例題2.(2022·全國(guó)·模擬預(yù)測(cè))如圖,在矩形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0為邊SKIPIF1<0上的任意一點(diǎn)(包含端點(diǎn)),SKIPIF1<0為SKIPIF1<0的中點(diǎn),則SKIPIF1<0的取值范圍是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題3.(2022·江西·模擬預(yù)測(cè)(理))已知圓SKIPIF1<0的半徑為2,點(diǎn)SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0分別是SKIPIF1<0上兩個(gè)動(dòng)點(diǎn),且SKIPIF1<0,則SKIPIF1<0的取值范圍是(

)A.[6,24] B.[4,22] C.[6,22] D.[4,24]例題4.(2022·上海松江·二模)已知正方形SKIPIF1<0的邊長(zhǎng)為4,點(diǎn)SKIPIF1<0、SKIPIF1<0分別在邊SKIPIF1<0、SKIPIF1<0上,且SKIPIF1<0,SKIPIF1<0,若點(diǎn)SKIPIF1<0在正方形SKIPIF1<0的邊上,則SKIPIF1<0的取值范圍是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題5.(2022·黑龍江·哈爾濱三中模擬預(yù)測(cè)(理))已知拋物線SKIPIF1<0:SKIPIF1<0,點(diǎn)SKIPIF1<0為直線SKIPIF1<0上一動(dòng)點(diǎn),過(guò)點(diǎn)SKIPIF1<0作直線SKIPIF1<0,SKIPIF1<0與拋物線SKIPIF1<0分別切于點(diǎn)SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.0 B.1 C.-1 D.0或1【提分秘籍】求兩個(gè)向量的數(shù)量積有三種方法:(1)利用定義(包括向量數(shù)量積幾何意義)(2)利用向量的坐標(biāo)運(yùn)算(自主建系,只要題目有可以建系的條件,可通過(guò)建系法求解);(3)利用向量三角不等式SKIPIF1<0(同號(hào)同向取等號(hào);異號(hào)反向取等號(hào))例如:SKIPIF1<0中間的連接號(hào)都是“SKIPIF1<0”,記憶口訣:同號(hào)則SKIPIF1<0,SKIPIF1<0同向不等式SKIPIF1<0取到等號(hào);在不等式SKIPIF1<0中,中間的連接號(hào)“SKIPIF1<0”和“SKIPIF1<0”,記憶口訣:異號(hào)則SKIPIF1<0,SKIPIF1<0反向不等式SKIPIF1<0取到等號(hào);【變式演練】1.(2022·四川·射洪中學(xué)模擬預(yù)測(cè)(理))在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0為線段SKIPIF1<0的中點(diǎn),SKIPIF1<0,SKIPIF1<0為線段SKIPIF1<0垂直平分線SKIPIF1<0上任一異于SKIPIF1<0的點(diǎn),則SKIPIF1<0(

)A.SKIPIF1<0 B.4 C.7 D.SKIPIF1<02.(2022·全國(guó)·模擬預(yù)測(cè))如圖,在平行四邊形SKIPIF1<0中,SKIPIF1<0,點(diǎn)E是SKIPIF1<0的中點(diǎn),點(diǎn)F滿足SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0(

)A.9 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·北京·人大附中模擬預(yù)測(cè))窗花是貼在窗紙或窗戶玻璃上的剪紙,是中國(guó)古老的傳統(tǒng)民間藝術(shù).圖1是一張由卷曲紋和回紋構(gòu)成的正六邊形前紙窗花.圖2中正六邊形SKIPIF1<0的邊長(zhǎng)為4,圓SKIPIF1<0的圓心為該正六邊形的中心,圓SKIPIF1<0的半徑為2,圓SKIPIF1<0的直徑SKIPIF1<0,點(diǎn)SKIPIF1<0在正六邊形的邊上運(yùn)動(dòng),則SKIPIF1<0的最小值為(

)A.5 B.6 C.7 D.84.(2022·全國(guó)·模擬預(yù)測(cè))在SKIPIF1<0中,已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,點(diǎn)SKIPIF1<0在邊SKIPIF1<0上,則SKIPIF1<0的最大值為(

)A.3 B.2 C.SKIPIF1<0 D.SKIPIF1<05.(2022·四川·成都七中一模(文))已知SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0的最小值是_____________.6.(2022·上海崇明·一模)在邊長(zhǎng)為2的正六邊形ABCDEF中,點(diǎn)P為其內(nèi)部或邊界上一點(diǎn),則SKIPIF1<0的取值范圍為_(kāi)_____.7.(2022·安徽·全椒縣第八中學(xué)模擬預(yù)測(cè)(理))騎自行車(chē)是一種環(huán)保又健康的運(yùn)動(dòng),如圖是某一自行車(chē)的平面結(jié)構(gòu)示意圖,已知圖中的圓SKIPIF1<0(前輪),圓SKIPIF1<0(后輪)的半徑均為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0均是邊長(zhǎng)為SKIPIF1<0的等邊三角形.設(shè)點(diǎn)SKIPIF1<0為后輪上的一點(diǎn),則在騎行該自行車(chē)的過(guò)程中,SKIPIF1<0的最大值為_(kāi)_____.題型三:向量的夾角【典例分析】例題1.(2022·廣西北?!ひ荒#ㄎ模┮阎蛄縎KIPIF1<0是單位向量,向量SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0與SKIPIF1<0的夾角為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題2.(2022·云南大理·模擬預(yù)測(cè))已知向量SKIPIF1<0滿足SKIPIF1<0,則向量SKIPIF1<0與SKIPIF1<0所成的夾角為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題3.(2022·浙江·模擬預(yù)測(cè))已知平面向量SKIPIF1<0滿足:SKIPIF1<0,若對(duì)滿足條件的任意向量SKIPIF1<0,SKIPIF1<0恒成立,則SKIPIF1<0的最小值是______________.【提分秘籍】求向量夾角公式:SKIPIF1<0【變式演練】1.(2022·全國(guó)·模擬預(yù)測(cè)(理))已知平面向量SKIPIF1<0與SKIPIF1<0互相垂直,模長(zhǎng)之比為2:1,若SKIPIF1<0,則SKIPIF1<0與SKIPIF1<0的夾角的余弦值為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·山東德州·模擬預(yù)測(cè))已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·湖南·模擬預(yù)測(cè))已知向量SKIPIF1<0,SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0與SKIPIF1<0的夾角的最大值為(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<04.(2022·廣西北海·一模(理))已知向量SKIPIF1<0是單位向量,向量SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0與SKIPIF1<0的夾角為_(kāi)____________.題型四:向量模(含最值,范圍問(wèn)題)【典例分析】例題1.(2022·浙江紹興·一模)已知向量SKIPIF1<0,SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.2 B.SKIPIF1<0 C.1 D.SKIPIF1<0例題2.(2022·山東·德州市教育科學(xué)研究院三模)已知平面向量SKIPIF1<0,SKIPIF1<0,且非零向量SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0的最大值是(

)A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.2例題3.(2022·四川資陽(yáng)·一模(理))已知平面向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0滿足SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0的最大值為_(kāi)_____.例題4.(2022·浙江紹興·一模)已知圓SKIPIF1<0:SKIPIF1<0,線段SKIPIF1<0在直線SKIPIF1<0:SKIPIF1<0上運(yùn)動(dòng),點(diǎn)SKIPIF1<0為線段SKIPIF1<0上任意一點(diǎn),若圓SKIPIF1<0上存在兩點(diǎn)SKIPIF1<0,SKIPIF1<0,使得SKIPIF1<0,則線段SKIPIF1<0長(zhǎng)度的最大值是______.例題5.(2022·江西南昌·模擬預(yù)測(cè)(文))已知SKIPIF1<0為正交基底,且SKIPIF1<0,SKIPIF1<0分別為SKIPIF1<0的中點(diǎn),若SKIPIF1<0,則SKIPIF1<0的最小值為_(kāi)____.【提分秘籍】求兩個(gè)向量的模方法:(1)SKIPIF1<0可通過(guò)基底法表示向量求模,也可通過(guò)建系法用坐標(biāo)表示向量求模(2)利用向量三角不等式SKIPIF1<0(同號(hào)同向取等號(hào);異號(hào)反向取等號(hào))例如:SKIPIF1<0中間的連接號(hào)都是“SKIPIF1<0”,記憶口訣:同號(hào)則SKIPIF1<0,SKIPIF1<0同向不等式SKIPIF1<0取到等號(hào);在不等式SKIPIF1<0中,中間的連接號(hào)“SKIPIF1<0”和“SKIPIF1<0”,記憶口訣:異號(hào)則SKIPIF1<0,SKIPIF1<0反向不等式SKIPIF1<0取到等號(hào);【變式演練】1.(2022·全國(guó)·大化瑤族自治縣高級(jí)中學(xué)模擬預(yù)測(cè)(文))已知點(diǎn)A?B在單位圓上,SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0的最小值是(

)A.2 B.3 C.SKIPIF1<0 D.42.(2022·河南·平頂山市第一高級(jí)中學(xué)模擬預(yù)測(cè)(文))已知A,B為圓SKIPIF1<0上的兩動(dòng)點(diǎn),SKIPIF1<0,點(diǎn)P是圓SKIPIF1<0上的一點(diǎn),則SKIPIF1<0的最小值是(

)A.2 B.4 C.6 D.83.(2022·浙江·樂(lè)清市知臨中學(xué)模擬預(yù)測(cè))平面向量SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0與SKIPIF1<0夾角最大值時(shí)SKIPIF1<0為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·海南華僑中學(xué)模擬預(yù)測(cè))已知不共線的平面向量SKIPIF1<0兩兩所成的角相等,且SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.2 C.3 D.2或35.(2022·浙江·三門(mén)縣觀瀾中學(xué)模擬預(yù)測(cè))已知SKIPIF1<0為單位向量,SKIPIF1<0滿足SKIPIF1<0,當(dāng)SKIPIF1<0與SKIPIF1<0的夾角最大時(shí),SKIPIF1<0_________.題型五:平面向量的平行與垂直問(wèn)題【典例分析】例題1.(2022·黑龍江·哈爾濱三中模擬預(yù)測(cè))已知向量SKIPIF1<0SKIPIF1<0,SKIPIF1<0SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題2.(2022·江蘇·揚(yáng)州中學(xué)模擬預(yù)測(cè))已知向量SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.2 C.8 D.SKIPIF1<0例題3.(2022·四川省綿陽(yáng)八一中學(xué)模擬預(yù)測(cè)(理))已知向量SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0___________.例題4.(2022·陜西渭南·一模(文))已知點(diǎn)SKIPIF1<0,SKIPIF1<0,向量SKIPIF1<0,若SKIPIF1<0,則實(shí)數(shù)SKIPIF1<0等于___________.【提分秘籍】?jī)蓚€(gè)向量平行、垂直的坐標(biāo)表示已知非零向量SKIPIF1<0,(1)SKIPIF1<0.(2)SKIPIF1<0【變式演練】1.(2022·貴州貴陽(yáng)·模擬預(yù)測(cè)(文))已知平面向量SKIPIF1<0,若SKIPIF1<0與SKIPIF1<0垂直,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·江蘇·南京市江寧高級(jí)中學(xué)模擬預(yù)測(cè))若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的值為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·四川綿陽(yáng)·一模(理))已知向量SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0______.4.(2022·廣東茂名·二模)已知向量SKIPIF1<0(t,2t),SKIPIF1<0=(﹣t,1),若(SKIPIF1<0﹣SKIPIF1<0)⊥(SKIPIF1<0+SKIPIF1<0),則t=_____.題型六:三點(diǎn)共線的等價(jià)關(guān)系【典例分析】例題1.(2022·陜西·漢陰縣第二高級(jí)中學(xué)一模(理))已知SKIPIF1<0是SKIPIF1<0內(nèi)一點(diǎn),SKIPIF1<0,若SKIPIF1<0與SKIPIF1<0的面積之比為SKIPIF1<0,則實(shí)數(shù)SKIPIF1<0的值為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題2.(2022·河南·南陽(yáng)中學(xué)模擬預(yù)測(cè)(文))SKIPIF1<0中,若SKIPIF1<0,點(diǎn)SKIPIF1<0滿足SKIPIF1<0,直線SKIPIF1<0與直線SKIPIF1<0相交于點(diǎn)SKIPIF1<0,則SKIPIF1<0的長(zhǎng)(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例題3.(2022·吉林·東北師大附中模擬預(yù)測(cè))在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0分別是邊SKIPIF1<0,SKIPIF1<0上的點(diǎn),且SKIPIF1<0,SKIPIF1<0,點(diǎn)SKIPIF1<0是線段SKIPIF1<0上異于端點(diǎn)的一點(diǎn),且滿足SKIPIF1<0,則SKIPIF1<0_________.例題4.(2022·湖南·雅禮中學(xué)一模)在SKIPIF1<0中,SKIPIF1<0SKIPIF1<0在邊SKIPIF1<0上,延長(zhǎng)SKIPIF1<0到SKIPIF1<0,使得SKIPIF1<0,若SKIPIF1<0(SKIPIF1<0為常數(shù)),則SKIPIF1<0的長(zhǎng)度是________.【提分秘籍】設(shè)平面上三點(diǎn)SKIPIF1<0,SKIPIF1<0,SKIPIF1<0不共線,則平面上任意一點(diǎn)SKIPIF1<0與SKIPIF1<0,SKIPIF1<0共線的充要條件是存在實(shí)數(shù)SKIPIF1<0與SKIPIF1<0,使得SKIPIF1<0,且SKIPIF1<0.特別地,當(dāng)SKIPIF1<0為線段SKIPIF1<0的中點(diǎn)時(shí),SKIPIF1<0.【變式演練】1.(2022·山東煙臺(tái)·三模)如圖,邊長(zhǎng)為2的等邊三角形的外接圓為圓SKIPIF1<0,SKIPIF1<0為圓SKIPIF1<0上任一點(diǎn),若SKIPIF1<0,則SKIPIF1<0的最大值為(

)A.SKIPIF1<0 B.2 C.SKIPIF1<0 D.12.(2022·安徽·合肥市第六中學(xué)模擬預(yù)測(cè)(理))如圖,在SKIPIF1<0中,M,N分別是線段SKIPIF1<0,SKIPIF1<0上的點(diǎn),且SKIPIF1<0,SKIPIF1<0,D,E是線段SKIPIF1<0上的兩個(gè)動(dòng)點(diǎn),且SKIPIF1<0,則SKIPIF1<0的的最小值是(

)A.4 B.SKIPIF1<0 C.SKIPIF1<0 D.23.(2022·山東濱州·二模)在SKIPIF1<0中,M為BC邊上任意一點(diǎn),N為線段AM上任意一點(diǎn),若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0),則SKIPIF1<0的取值范圍是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·河南·安陽(yáng)一中模擬預(yù)測(cè)(文))在SKIPIF1<0中,點(diǎn)D在BC上,且滿足SKIPIF1<0,點(diǎn)E為AD上任意一點(diǎn),若實(shí)數(shù)x,y滿足SKIPIF1<0,則SKIPIF1<0的最小值為(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<05.(2022·上海市實(shí)驗(yàn)學(xué)校模擬預(yù)測(cè))已知點(diǎn)SKIPIF1<0為SKIPIF1<0的重心,過(guò)SKIPIF1<0作直線與SKIPIF1<0、SKIPIF1<0兩邊分別交于SKIPIF1<0、SKIPIF1<0兩點(diǎn),且SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的值為_(kāi)_______.一、單選題1.(2022·貴州·貴陽(yáng)六中一模(理))在平行四邊形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.1 B.-1 C.9 D.-92.(2022·上海普陀·一模)設(shè)SKIPIF1<0,若向量SKIPIF1<0、SKIPIF1<0、SKIPIF1<0滿足SKIPIF1<0,且SKIPIF1<0,則滿足條件的k的取值可以是(

)A.1 B.2 C.3 D.43.(2022·河南·民權(quán)縣第一高級(jí)中學(xué)模擬預(yù)測(cè)(文))已知在平行四邊形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.6 B.4 C.3 D.24.(2022·全國(guó)·模擬預(yù)測(cè))已知向量SKIPIF1<0,SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.(2022·云南·昆明一中模擬預(yù)測(cè)(理))設(shè)D為SKIPIF1<0所在平面內(nèi)一點(diǎn),SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.(2022·全國(guó)·模擬預(yù)測(cè))如圖,在SKIPIF1<0中,點(diǎn)D是邊AB上一點(diǎn)且SKIPIF1<0,E是邊BC的中點(diǎn),直線AE和直線CD交于點(diǎn)F,若BF是SKIPIF1<0的平分線,則SKIPIF1<0(

)A.4 B.3 C.2 D.SKIPIF1<07.(2022·全國(guó)·模擬預(yù)測(cè))如圖,在平行四邊形SKIPIF1<0中,點(diǎn)SKIPIF1<0在線段SKIPIF1<0上,且SKIPIF1<0(SKIPIF1<0),若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0)且SKIPIF1<0,則SKIPIF1<0(

)A.SKIPIF1<0 B.3 C.SKIPIF1<0 D.48.(2022·江蘇鹽城·模擬預(yù)測(cè))在SKIPIF1<0中,過(guò)重心E任作一直線分別交AB,AC于M,N兩點(diǎn),設(shè)SKIPIF1<0,SKIPIF1<0,(SKIPIF1<0,SKIPIF1<0),則SKIPIF1<0的最小值是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.3 D.29.(2022·廣西·南寧市第十九中學(xué)模擬預(yù)測(cè)(文))SKIPIF1<0的外心SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的面積為(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.210.(2022·河南·一模(理))在SKIPIF1<0中,SKIPIF1<0,點(diǎn)SKIPIF1<0在線段SKIPIF1<0上且與端點(diǎn)不重合,若SKIPIF1<0,則SKIPIF1<0的最大值為(

).A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多選題11.(2022·全國(guó)·模擬預(yù)測(cè))已知過(guò)拋物線SKIPIF1<0:SKIPIF1<0的焦點(diǎn)SKIPIF1<0的直線SKIPIF1<0:SKIPIF1<0與拋物線SKIPIF1<0交于SKIPIF1<0

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