山東省濟(jì)寧市2020-2021學(xué)年高三上學(xué)期期末數(shù)學(xué)試題及答案

∣xx20，Bxyln1ABAx（）220,2．2,2,．．D．a(chǎn)i（a）i3i32232332．．．．tan2（）1cos21．6123．．D13a1axa1y30a2xay10）D年43212名21種種種D種）fxxe12x）．．．．:y2pxp03lC與A、B2CFF3ABC）3xy4xy6xy8xD．、．y．．2222xf11fxxRfxxR，fxx181fxx0fxx1fx02x）x10,12,,22,．．．．2,1,12,a，b，c，d）ccab0bcda，adbcabbcd，acbdab1444aablP1,2xay30xy423線la22）344．343D．0．sinx0,||11fx24x）fxfx,612,0fx24fx26gxsin2xABCDAB2，ABCM△，為BCABMAM△ABMBC和BD1，N為BD）111BC．AM1．CN．AB與CN61BAMD1AMDB12,1,2xxxffefx則．lnx,x1,36x．xABCDAB，2AD1P，ABCDPA1PCPD．xybbaba22:1ab0::xlyCFly1x，a222FN過F作lM，該垂線交lN，OOFC12．sinsinaCcccosAacosBbcosAAb2cabc223△ABCA，B，，b，cb3S，33Ca△求ab1ab8ab．a(chǎn)ba，，113253nnabnn1cnS．bnNcaannnnnn1ABCACCAABC2ABCACCA1111111AAC60BB，E是F是AC與AC1111//EFABC；BCAAB1ABCD區(qū)域是休閑健身區(qū)，以CDPCDABO．COBPCDS．設(shè)，S1lnxa11aR．fxxfx01,在afx3xy22:1ab03,2CA、BC的C32ab2C于P、APAQAHPQH，．lQC）求△ABH2020~2021學(xué)年度第一學(xué)期高三質(zhì)量檢測數(shù)學(xué)試題參考答案及評分標(biāo)準(zhǔn)ABCACDCD23222．．3sinsinaCcA，3sinAsinCsinCsinA，30CsinC013sinAsinAsinAcosA，3221即3sinAcosA22tanA30AA．311333bcsinAcc33c4，Sa2224△ABC1bcA3423413a．222222ccosAacosBbcosA，2sinCcosAsinAcosBsinBcosA，2sinCcosAsinABsinCsinC10CsinC0，A20AA，311333bcsinAcc334，Sac2224△ABC1bcA3423413a．222222cabcbcabcb2，22222bca12222A，0AA，311333bcsinAcc334，Sac2224△ABC1bcA3423413a．2222220adbqq，nn12dq814dq,2d2d6或315q2n1，nNanb3nNn1n111133n1，c1n(2n1)(2n1)22n12n1n111111131131nn11S23352n12n11322n12n2n131n4n2CCMEM，F(xiàn)M1F是AC與ACACCA1111F是ACFMAC1FMABC，ACCABCFM//ABCBB//CC，BBCC，E為BBBECMBECM，11111BCMEEMBC又EMABCBC，ABCEM//ABCEMFMM，EMEFM，F(xiàn)MEFMEFM//ABCEFEFMEF//ABCACOOB，OFF是AC與AC11ACCA11F是AC112OF//AA，11//BBAABB又E是BBAA1，1111OFBEOFBE，EFOBOBEF又EFABCOB，ABCEF//ABC60OA，ACCAAAC1111△AACAOAC11ACCAABCACCAABCABCAC，AOACCA1111111AOABC1ABCO為ACBOAC以O(shè)OB，OC，OAzxyABC2A0,0C0,0,3，A3,0,0，B，1AB3,1,0AA0,1,3BC3,1,0，BC200sin，1x,y,zAABn1030x1xyn3由得y10z30zny1n1,3,1n33sinBC,n．255nOB200cos，PCDCD200200sin，122S80000sincos40000coscossin400002sincoscossin40000sincoscos40000sincoscos0S．2sincoscos）f，12sin，cossinsin2sinsin12sin則f222000由f得，f得，662,620,f在63333ff，66424max334Smax40000300003，30003m．2即6fx0,．11axa1fxxx2lnxa1fx．xx2當(dāng)a對0fx0x0,當(dāng)a得，得．0fx0xafx00xa0fx在0,aa,0fx0,a在當(dāng)aax11fx0ln1得xa10x，1xxxxx對x即ax1lnx11x1(xlnxx)xxx1xlnx2xgx令gx，x12x121x11xlnx2令hxhxx1x0，xxh31ln30h42ln40，，1,hx在3,4ln20xxx000hx0，gx，當(dāng)1xx00hx0gx0，x當(dāng)x，01,xx,gx在x，00xx2xgxgx00x0100min0x3x，aZa，00a．c3a332a612bab22c2abc222x2y21C．642kxmmPQPQyykxmk2x6m0由得222，x2y21642，36kmk2m46k4m222226m2,yQx,yx設(shè)Px，x，xx，k2k21122121222AQAPAQxxy2y2xxkxm2kxm2AP12121212k1xxk(m2)xxm2022，1212m62km2m20，k212k2k22221m126kmm2m2k20即k22222k2162320kmmmkm22km6km66kmkm2m6k40，2222220m．5252y0,PQPQ．511△ABHk0yx，2AHkk25yx為Hx11HHyx25kkk11122412ABx4S，22511H5k5kkk151△ABHk即k．kPQPQDAHHAD，2211554S，2222△H5即△ABH．6m2,yQx,yx設(shè)Px，x，xx，k2k21122121222AQAPAQxxy2y2xxkxm2kxm2AP12121212k1xxk(m2)xxm2022，1212m62km2m20，k212k2k22221m126kmm2m2k20即k22222k216232