-數(shù)學(xué)-山西省三重教育聯(lián)盟2023-2024學(xué)年高三上學(xué)期9月聯(lián)考試題和答案

參考答案（數(shù)學(xué)）第1頁共6頁單項(xiàng)選擇題_____、單項(xiàng)選擇題12345678DACCBABD·:BE(0,兀:.sinB*0,..smA=Sm(A——)＋—,.fj.fj:.sinA=sinA—cosA+,'3.fj.fj·ππ4π:AE(0,兀:.A+·ππ4π:.A+=，解得A=ππ3(2)·:A=—，且MBC的面積為，·:D為BC的中點(diǎn)，:.2A=AB'+AC',-一2一2---2解得m了=7,:.AD的長為打.···············!分..............·2分···············3分..............·4分..............·5分..............·6分..............·7分..............·8分...............9分···············10分參考答案（數(shù)學(xué)）第2頁共6頁zz:.2a+—=29,a11,解得或I1,解得\d=3\a1=—,22—,93 +).l—3)·()曰又·:AC_l_BF,AC與BD相交，:.BF_l_平面ABCD;..............·2分..............·3分···············4分..............·6分...............7分...............8分...............9分···············10分···············11分···············12分···············1分..............·3分···············4分XFy參考答案（數(shù)學(xué)）第3頁共6頁...............7分???.....?......8分???.....?......9分...........................7分???.....?......8分???.....?......9分...............11分...............12分..............·2分..............·3分..............·4分...............11分...............12分..............·6分..............·6分設(shè)平面CBG的一個(gè)法向量為n=(x,y,z),則則令·:AC..lBF,AC..lBD,BF門BD=B,BF,BD已平面BGD,=2,兀五言]二2XXXX..............·6分..............·6分···············7分···············7分:.X的可能取值為0,I,2,3.P(X=0)=＝，P(X=1)=c:c='P(X=2)=c.c=,P(X=3)=1，c:14c:84:.x的分布列如下：X。123531E(X)=Ox—+Ix—+2x—+3x—=1.參考答案（數(shù)學(xué)）第4頁共6頁（或因?yàn)閄服從超幾何分布，所以E(X)=3x=1.)〈22_2')_2:x1-x2x1+x2x1-x22x。x1-x2x0a2x1-x2x1+x2x1-x22x。x1-x2x0a2,設(shè)直線MN的方程為y=kx+m,4y212,由得(4k23)x28kmx4m2124y212,14···············1分..............·2分···············3分..............·4分···············5分...............7分_k222)222k22k—2—-2+32—2,==,2—2解得m=2k(舍去）或m=-k,·:QM=(x1—2,Yi),4k2—:—2)(x2—2)+y心..............·9分參考答案（數(shù)學(xué)）第5頁共6頁——)—5k20':．點(diǎn)Q在以MN為直徑的圓內(nèi).:.f'(x)=aex(I+lnx)+aex=aex·xlnx+x+I.XX令t(x)=xlnx+x+l,則t'(x)=lnx+2.·:t'(x)單調(diào)遞增且t'()=0'e:.t(x):.t(x)t()=1—>0':.f'(x)>0,即f(x)在定義域(0,+oo)上單調(diào)由題g(x)—f(x)>0,即aex(I+Inx)<x2+x(I+Ina),aeXXXe···············11分...............12分..............·1分...............2分...............3分..............·4分···············5分???.....?......6分..............·7分...............8分???....??......9分eXeX