2020-2021學(xué)年天津市楊柳青一中、咸水沽一中、天津四十七中、天津一百中四校聯(lián)考高二(上)期末數(shù)學(xué)試卷
發(fā)布:2024/11/3 0:30:2
一、單項(xiàng)選擇題(5/45)
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1.經(jīng)過(guò)點(diǎn)A(2,2),且與直線(xiàn)3x-y+2=0平行的直線(xiàn)方程為( ?。?/h2>
A.x+3y-8=0 B.x+3y+8=0 C.3x-y-4=0 D.3x-y+4=0 組卷:100引用:3難度:0.7 -
2.與橢圓
=1有公共焦點(diǎn),且離心率為x216+y212的雙曲線(xiàn)的標(biāo)準(zhǔn)方程為( ?。?/h2>2A. =1x22-y22B. =1y22-x22C. x22-y26=1D. y26-x22=1組卷:140引用:2難度:0.7 -
3.已知數(shù)列{an}是等比數(shù)列,a2?a6?a10=3
,數(shù)列{bn}是等差數(shù)列,b1+b6+b11=6,則的3的值是( ?。?/h2>a4?a8b3+b9A. 32B. 34C. 32D. 34組卷:262引用:4難度:0.7 -
4.如圖,在平行六面體ABCD-A1B1C1D1中,AB=AD=AA1=2,∠A1AB=∠A1AD=60°,∠BAD=90°,則A1C的長(zhǎng)為( ?。?/h2>
A.1 B.2 C.3 D.4 組卷:37引用:3難度:0.6 -
5.已知拋物線(xiàn)的準(zhǔn)線(xiàn)是圓x2+y2-4=0與圓x2+y2+y-3=0的公共弦所在的直線(xiàn),則拋物線(xiàn)的標(biāo)準(zhǔn)方程為( )
A.y2=4x B.y2=-4x C.x2=4y D.x2=-4y 組卷:226引用:5難度:0.7 -
6.在棱長(zhǎng)為2的正方體ABCD-A1B1C1D1中,點(diǎn)M為棱CC1的中點(diǎn),則點(diǎn)B到平面A1B1M的距離為( )
A. 5B. 255C. 355D. 455組卷:29引用:1難度:0.6
三、解答題(14,15,15,15,16/75)
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19.已知F1是橢圓
=1(a>b>0)的左焦點(diǎn),上頂點(diǎn)B的坐標(biāo)是(0,x2a2+y2b2),離心率為2.63
(Ⅰ)求橢圓的標(biāo)準(zhǔn)方程;
(Ⅱ)O為坐標(biāo)原點(diǎn),直線(xiàn)l過(guò)點(diǎn)F1且與橢圓相交于P,Q兩點(diǎn).
(ⅰ)若△OPQ的面積為,求直線(xiàn)l的方程;263
(ⅱ)過(guò)點(diǎn)F1作EF1⊥PQ與直線(xiàn)x=-3相交于點(diǎn)E,連接OE,與線(xiàn)段PQ相交于點(diǎn)M,求證:點(diǎn)M為線(xiàn)段PQ的中點(diǎn).組卷:66引用:1難度:0.3 -
20.已知數(shù)列{an}的前n項(xiàng)和公式為Sn=2an-2(n∈N*),bn=2log2an.
(Ⅰ)求證:數(shù)列{an}是等比數(shù)列;
(Ⅱ)令cn=an+(-1)nbn,求數(shù)列{cn}的前n項(xiàng)和Tn;
(Ⅲ)設(shè)pn=,求pn?pn+1的最大值.n2an-1組卷:113引用:1難度:0.5