2021-2022学年广东省汕尾市中考数学测试模拟试卷（5月）含解析

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2021-2022
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21ᑣB⚗23᝕&ᦪ(20x25%—3=2,E>ᵱᨵ20—(2+5+6+4+2)=1&,⊡ᐰIJ᝞L:X——20(3)M᪛OI᝞L:
ᵱ᝕A\/1\ᵱ᝕᝕ᵱ᝕᝕ᵫ᪛OIQᐳᨵ12STUVW,ᐸ3ាᑮ᝕Ḅᨵ2SVW,21ᡠZាᑮ᝕Ḅᭆ᳛(—126ூ[\௃]⚪ὃ`aᑡ⊤dᡈ᪛OIdᭆ᳛ZfghIḄQi•klᭆ᳛=ᡠᦪ%ᦪmn.25.᝞IoNBCrAEC஺sTῪguvuJCA=CB,CE=CD,A/CBḄ⚔[/ᙠoECDḄz{஺E}ABஹCD./F,~80.(1)AECA^DCB3(2)AE2+AD2=2AC2;ব4E=2,AF5CF=653,48Ḅ.+18⚓/%23⚓

22ூᫀ௃(1)(2)᪆(3)⌳.2ூ᪆௃ூᑖ᪆௃(1)᪷TῪguvuJḄឋᑮ/ECA=NDCB,ᑭᵨSASᳮ(2)᪷ᐰTvuJḄឋᑮ/CDB=/CEA=45°AE=DB,ᑮ/ADB=90"᪷ᳮᓽ(3)AAFDSACFB,᪷vuJḄឋஹ(2)ḄVᓽ.ூ௃:(1):oABCrAECDsTῪguvuJNECD=/ACB=90°/ECA=/DCBᙠAECArADCB3'CE=CDᙠTῪguAACB3AB2=2AC2AE2+AD2=2AC2(3)/ADC=/ABC=45°,NAFD=/CFB,..AAFDSACFB,.AD_AF_V2"BC-FC-VAD=0aᑣBC--3a,AB=3-Jia,ᵫফ22+(V2a)2=2x(3a)2,+19⚓/%23⚓

23a=L2ᑣAB=30a=.2ூ[\௃#⚪ὃ`ḄTῪguvuJḄឋஹᐰTvuJḄᑨrឋஹvuJḄᑨrឋ¡ᐵḄᑨᳮrឋᳮ⚪Ḅᐵ£.226.᝞I1,¤ᱥa=—§/+᱐+஺8(3,0),C(0,4)[¤ᱥx¨Ḅ©ª«[(4~/CஹBC.(1)¤ᱥḄ᪆f[AḄᙶ᪗(2)[ONCḄ3[~BD,ᙠy¨}ᔲ¯ª[E,78ABDE9:BD;<=ḄguvuJ°¯ᙠ±[EḄᙶ᪗²ᨵ¯ᙠ³ᳮᵫ(3)᝞I2,´(¤ᱥᙠµ▲ᑁª¸[¹´ºPQ_L5C»0,¼´0Ḅ½¾ᙠBCூᫀ௃প4(—2,0)(2)¯ᙠ¿(0,-1)ᡈ(0,3)+ḄᨬÁÂg.ூ᪆௃ூᑖ᪆௃(1)ᑭᵨÃÄᦪd¤ᱥḄ᪆Åy=ohÆAḄᙶ᪗(2)᪷/DEB=90°᪀ÈÉÊᙊy¨ᨵÌ«[([E,᪷ᳮᑡhÆ[EḄᙶ᪗(3)ᐜºg//BC,Îg1¤ᱥᨵªÌᐳ[ᓽA=0,PḄᙶ᪗¹Pº+20⚓/%23⚓

244PN_Lx¨BC»M,]¾PM+^BMḄÂᨬÁ᪷vuÔᦪÕᐸᨬÁÂPNḄᓽ.2ூ௃:পÖB(3,0),C(0,4)×ᐭ¤ᱥy=—§x2+bx+c322——x32+3ft+c=0b=—<3,3,c=4c=422••¤ᱥḄ᪆(y="X2+-X+4,3322¼y=0¾ªªx2+-x+4=0,33X1=-2,x=3,2.'.A(-2,0)(2)¯ᙠ᝞I1,I1vA(-2,0),C(0,4),E(0,m),•••/DEB=90°DE2+BE2=BD2ᓽ(-1)2+(2-01)2+32+1/=(3+l)2+(0-2)2,m2-2m-3=0+21⚓/%23⚓

25m,=-1,in2=3,.•E)O,-1ᡈ)0,3*)3*vB)3,0*,C)0,4*,4᧕BCḄ᪆(y=—x+4,3᝞I2,ºg1//BC,I24g1Ḅ᪆(y=—x+n,3¼g1¤ᱥᨵªÌᐳ[¾êÌᐳ[(P,]¾PQḄ,E422ᑣ—x+n=—x2H—x+4,3332x~—6x+3n—12=0o=)-62-4x2x)3n-12*=0,11n=—22x2-6x+3x—-12=0,23X1=x=—,22¹PºPNJ.X¨»N,«BC»M,+22⚓/%23⚓

26COMN4,/sin/CBOBC-BM54•MN=-BM,547•.PM+-BM=PM+MN=PN=-5247ᓽPM+-BMḄᨬÁª.52ூ[\௃#⚪ὃ`aÃÄᦪdÔᦪrë$ÔᦪḄ᪆ஹᵨᚖᨬíÕrḄᨬÂî⚪ஹªᐗë$hÆஹᳮḄðᵨஹ┦uvuÔᦪḄðᵨ⚪Ḅò[ᙠ+vîóẚ4õÕPM+öBMḄÂᨬÁ¾MḄ÷.+23⚓/%23⚓