2018年重點高中高一分班考試數(shù)學(xué)試卷及答案

分）如果一元一次不等式組a333223=101a1,bba．米a221．．12xx4k1k1212410，，033ky，xy12CxA4PxxOxB2，23318．．111x2，，，，1，式1x2012O切O在O與O23．4π7x2xy3y8122．65417題64x2x7x0x(xx2)(x①2；②；11xx4x2(2a)xa10③2；x2xabc＋＋cabacbc＋＋abacbcc=＋ab，則P是.32.1xx28x162x5.xS:SAa、bb＞aab4，22QabDE則aba,b11=.PBCa2b210.ababab68分.x)3x1x2)12（Ⅰ）先化簡，再求值：=sin60.x1x14x5xy6y222xxy6y0y22x-2xy3y2228分3=D是于，5．CDAEB8分n11xl:ynl:y2x11與x軸nnn和yA和BAOs1111131:yxl與xyA和BAs,22222222l與xyA和BAOBS.nnAs；nnnnssss1232013111分12,yxbxc與、yCxABA21C，EE作xDP與yFP的yxoBAC32．cba；=．C②ABED第)3系在x=12By=cP①PMa②CM于Fy3Qy=14335(3)1a.;;2231x4533..1....3→→交于F353CF655?！?5:y2x1與xy當(dāng)l11114A（B）=,∴s=221111131當(dāng)l2:yx2與xy211A（B，）322211111111=,=,∴s=()=3223222322241當(dāng)l:yx3與xy33311A（B，）433311111111OA=,OB=,∴s=()=43243234333111s()2nn1n11111111∴ssss=(222334)20132014123111ssss=(1120132013)∴==2222014220144018123122xbxcy2bc0∴c1111=－=1yxx12222D））∴mm5ADDEAOOC2mDE2m△∴21212mm2m11(m2=×42=2244當(dāng)△D）52abc222cba0∵∴2cab2abc222，222bac222ba(ab)∴2222∴b22a2得b2acbaa∵∴∴2222c3aa:b:c1:2:3O°在在2222ADBDAB22D2∴∴22222222,2∴2222∴222::1:2:3AC:AE:CE3:2:1或AC:AE:CE1:2:3:1:3∵ACB:1:3即∴ABCAC:AE:CE3:2:1:3:1:3:1即ACBABC∴∵6，設(shè)（m>03333若Cy=22m=1與03C；233D過22A，；M以，y=c過和204abcb7a∴0abc∴cay=2(=)2279y=－)－；22479,－24M,3982∴a＜–.