2022年四川省资阳市乐至县中考数学全真模拟试卷含解析

《2022年四川省资阳市乐至县中考数学全真模拟试卷含解析》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2022
ḕ□ὃᦪᐰᔁ⚗1.ὃᔁ⚪ᓱ#$%&.2.⚪()*+,Ḅ./ஹ1ὃ23ᵨ0.5567⁐9:Ḅ;<=>ᑏᙠᔁA⚪ᓱḄBCDE.3.F᪶HIὃᕒᙠ⚪ᓱKᡠMNḄᩩPṹKḄ./ஹ1ὃ23RSTᔲVW.4.X⌱Z⚪*[ᵨ2B\=⚪ᓱKH]⌱⚗Ḅ^᪾`aஹ`7b᝞◤ᦋfᵨghijkl⌱`ᐸnᫀ.Xp⌱Z⚪*[ᵨ05567⁐9:Ḅ;<=ᙠ⚪ᓱKḄᢣCDEXᙠᐸnDEX#rsᦔ.5.᝞◤Xu[ᵨ2B\=vஹᑏwxyᩩஹW3z[{7ஹ{|.#ஹ⌱Z⚪}~⚪ᨵ#ᫀ~⚪3ᑖaᑖ30ᑖ1.⚗x?+ax+bᑖx+l
x-3
,ᑣaஹbḄᑖT}A.a=2,b=3B.a=-2,b=-3C.a=-2,b=3D.a=2,b=-32.᝞uᡠḄKᑖᙳᙊᐸuT}3.᝞uᱥyy=-x2+mxḄH¡yx=2,¢ᐵ¤xḄ-ᐗ§¨^©-x2+mx“=0tªᦪᙠl-54.°K⌕²³´ᓝ<¶·~¶·⍗ᑮ°ஹº»Ḅ¼½¾V¿°ÀÁ²³~¶·¾Tº»ê▭Å᪵Ḅ¼½T
113111A.-B•-C.—D.—I----1—2882225.Çᦪy=—2x>0
ḄuÈD¤
X

1A.É#Ê▲B.ɧÊ▲C.É´Ê▲D.É
Ê▲6.ÌḼÎÏÐÑÒÓÔÕÖ×ØÙÎÏÚᓬÜ#ÝÎÏᢥßàáâá20%,ãàáaᐗᑣßàá()A.(a-20%)ᐗB.(a+20%)ᐗC.ᐗD.aᐗ757.æçḄᓫáaᐗ/ᓟë✏ⅥḄᓫábᐗ/ᓟëî2ᓟëæç3ᓟë✏Ⅵᐳ◤()A.(a+b)ᐗB.(3a+2b)ᐗC.(2a+3b)ᐗD.5(a+b)ᐗ1Y8.ðñ#-——bçT()x-1x-1A.0B.1C.-1D.x_1aτ1rr9.ᙠ^©^-----1=--Âôõ¿Âö6,÷ᑖøḄT()23A.3x-l-6=2(3x+l)B.(x-l)-l=2(x+l)C.3(x-l)-l=2(3x+l)D.3(x-l)-6=2(3x+l)10.#ᐗ§¨^©x2-2x=0ḄT()A.xi=0,xi=2B.XI=LX2=2C.XI=0,X2=-2D.XI=1,XZ=-2§ஹ>ù⚪(ᐳ7⚪~⚪3ᑖaᑖ21ᑖ)11.úûüABCBC=4,AB=2AC,ᑣüABC☢þḄᨬᜧ
.AB12.ᑖḄ-y=.13.Ḅᨵ6ᳫᐸ2ᳫஹ4ᳫᳫ◀⁐᜜!ᐸ"#$.%&'(᥎*ᳫᑣ,-ᳫḄᭆ᳛-.14.᝞12G-3ABCḄ56CGḄ789:AB;D,GA=5cm,GC=4cm,GB=3cm,<3ADG=2D>?180஺Aᑮ3BDE,ABCḄ☢D=cm1.15.ᙠGᦪy=I,KLMxḄN
P-16.᝞1Q☢D1ḄRSTᑖᡂV☢DWḄ8STXQᐸ☢DWḄ8STᑖᡂV☢DL224

2ḄRST’XQᐸ☢DZḄRSTᑖᡂV☢D[Ḅ8ST'᝞]^_`abᵨ1TdeḄfgh1111111i:—+—H——I-----1-----+-+-----+------=24816326412817.᝞1RtAABCkᱏZC=90°,AC=6,BC=8,2DᙠmBCnoADᢚq<4ABDᢚrAᑮ4ABD,ABsmBC:;2E.t3DEBuvwvTᑣBDḄ8-.'B'wஹx⚪zᐳ7|⚪}ᑖ69ᑖ~18.10ᑖ~᝞1জᙠmTABCDAC_LBD;2E,AB=AC=BD,2MBC2N9AMnḄ2,MB=MN.1
BNᑖNABE2
tBD=LDN,mTDNBC_mT9BCḄ83
᝞1ঝt2FABḄ2FNஹFM,AMFNsaBDC.19.5ᑖ~|ᙠᳫAnᑮRSVḄᜧ᫑BC,ABஹCV2Ḅvᑖ$45஺ஹ35஺.ᜧ᫑BCsᙢ☢ᙠ☢nᐸ8100m,ᳫᙢ☢Ḅ.z¡¢ᶇ᦮ᦪ~z¥ὃᦪ§01135஺=0.57,cos35°=0.82,tan35°=0.70)

320.8ᑖ~᝞1ᙠ¨TABCD©BE_LAD;E,BF_LCD;F,AE=CF.21.10ᑖ~RtAOAB,ZOAB=90°,NABO=30°,ªmOB=4,?60°,᝞11,BC.1
®¯NOBC=—°2
᝞11,AC,©QP_LAC,ᚖ³P,0PḄ83
᝞12,2M,N&2஺*´ᙠAOCBmnµ¶M·OfCfB¸¹ᒴ»µ¶NOTBTC¸¹ᒴ»µ¶V2¼⍗µ¶¾¿2MḄµ¶»1.5ᓫÁ/Ã2NḄµ¶»1ᓫÁ/Ãĵ¶ÅxÃAOMNḄ☢D~'xÆ
~’NAᨬᜧ
Èᨬᜧ
ÉÊÈ22.10ᑖ~hiËg
-=.23.12ᑖ~hi-V45-|4sin30°-5/51+-—
-11224.14ᑖ~᝞1ᙠÌoKᵫ?¶Ḅ?Îᢣ┐ÁÐÑÒwᡧTḄ☢DÔ¼Õᑖ$᪗ᨵᦪ×2,3ஹ1.1
|?¶?ÎØ?ξ¿?¶ᢣ┐ᡠᢣᡧTḄᦪ×-᜻ᦪḄᭆ᳛;2
|ᐜ?¶?ÎØ?ξ¿?¶ÝÞ`ᢣ┐ᡠᢣᡧTḄᦪ×ḼX?¶?ÎØ?ξ¿?¶XØÝÞ`ᢣ┐ᡠᢣᡧTḄᦪ×Vᦪ×àá-3ḄâᦪḄᭆ᳛zᵨã᪛å1ᡈᑡ⊤ÕSé~.

4¥ὃxᫀஹ⌱⚪⚪ᨵᫀ⚪3ᑖᑖ30ᑖ
1ஹBூ᪆௃ᑖ᪆᪷᦮Ḅᐜ⚗ᯠ"#$%&aஹbᓽ(.*+x+1
x-3
=x2-3x+x-3=x2-2x-3ᡠ-a=2,b=-3,ᦑ⌱B.012⚪3⌕ὃ67᦮Ḅ89ᑖ+Ḅᐵ;ᑭᵨ>?@AḄB⌮DEḄᐵ;F+⚪ᐵG.2ஹCூ᪆௃H⚪ᑖ᪆•.•JKLMNOPᑖᙳRᙊTM•••ᐸVWXRYZᦑ⌱C.ὃ0[ᓫ]ᔠMḄ_WX.3ஹBூ᪆௃ᐜᑭᵨ`ᱥbḄ#cdef%&mgᑮ`ᱥb+᪆Ry=*2+4x,iegᑮ`ᱥbḄ⚔0ᙶ᪗R2,4
,mnE&ox=lᡈ3qy=3,rᔠsᦪXuᑭᵨ`ᱥby=-x?+4xvwby=tᙠ1VXV3Ḅzᑁᨵ|ᐳ0(~tḄz.ூ௃V`ᱥby=-x2+mxḄ#cdRwbx=2,

5.b=m=2,,2a2x-1
'àm=4,.*.y=-x2+4x,x=2y=-4+8=4,⚔2ᙶ᪗2,4
,Vᐵ;xḄ-ᐗïØSð-x2+mx-t=0tñᦪ~ᙠl⚪ὃ᪛ABCDᭆ᳛᪛ABC〉ᵨIJᡈIJLMNᡂḄPQ
⚪R⌕TUᑡᡠᨵḄV.ᵨᑮḄXY<ᭆ᳛=ᡠDᦪ[(ᦪ\].5ஹDூ
᪆௃

6᪷sᦪy=K,oZ<0,bḄᑖஹu▲ᙠu▲ᑁyXḄᜧᜧXg&ᫀ.ூ*+௃2+sᦪy=——(x>0)ḄXuu▲.xᦑ⌱D.ூ01௃2⚪3⌕ὃ67sᦪḄឋsᦪXuᑖḄu▲F+⚪ᐵG.6ஹCூ+᪆௃᪷⚪ᑡ&ᦪᓄ[ᓽ(gᑮr.ூ*+௃᪷⚪ga+(l-20%)=a+=.a(ᐗ)4J57ᦑᫀ⌱C.ூ01௃¢⚪ὃ6Ḅ£¤0Fᑡᦪ+⚪ḄᐵGF¥¦Ḅ§¨ᑡᦪ.7ஹCூ+᪆௃ᵨᓫ©ᦪªg&«2ᓟ®83ᓟ✏ⅥḄ±©m²³´ᓽ(.ூ*+௃«ᓫ©RaᐗḄ®2ᓟᵨµ2aᐗ«ᓫ©RbᐗḄ✏Ⅵ3ᓟᵨµ3bᐗᐳᵨµ(2a+3Z>)ᐗ.ᦑ⌱C.ூ01௃¢⚪3⌕ὃ6ᑡᦪ±©=ᓫ©ᦪª.8ஹCூ+᪆௃H⚪+᪆__L_^.!zId£i12_i.===X—1X—1X—1X—1ᦑ⌱C.ὃ0ᑖḄ´·.

79ஹDூ
᪆௃y_13`+1
6(------1)=------x6,...3(x-1)-6=2(3x+l),ᦑ⌱D.23<=b⚪ὃcdḄឋ
⚪Ḅᐵe$fgᳮ
cdḄឋb⚪ijẠ⚪l.10ஹAூ
᪆௃m⚪ᑖ᪆noVx(x-1)=0xi=0,xi=l.ᦑ⌱A.ὃ<
ᐗ-qdᑖ
C.ஹrs⚪(ᐳ7u⚪1u⚪3ᑖvᑖ21ᑖ)1611ஹ—3ூ
᪆௃yAC=xᑣAB=2x,᪷|☢~dSAAHC=2X^/l-COS2CᵫᳮDcosCᐭᓄ4ᵫIVIᐵD5Vx<4ᵫᦪḄឋDSAABCᨬᜧ.ூ
௃yAC=xJAB=2x,᪷|☢~d:c=gACBCsinC=2xsinC=2x^i-2Q.ᵫᳮ,cos16—3/•cosC~,ᵫIVIᐵᨵÚx2x++4xு>24“
34c<4,ᦑx=⌮R

8(ὃ⇋ᵨsᦪḄᓫÞឋ8~ßàáâ⚪,ã᫏⚪.12ஹy(x+1)(x-1)ூ+᪆௃åæ,y-y,çᑮ|9y"è&|9"éêëìíᔠîeï|ᑭᵨîeï|ðñᑖ+(g.ூ*+௃+=y(x2-1)=y(x+1)(x-1).ᦑᫀRy(x+1)(x-1).ூ01௃¢⚪ὃ67ᵨè|98|ò9ᑖ+⚗ᨵ|9✌ᐜèô|9ᯠ"mᵨᐸõeò9ᑖ+öq9ᑖ+⌕÷øwᑮùúᑖ+Rû.213ஹ3ூ+᪆௃᪷ᭆ᳛Ḅᭆþwÿ
.ூ௃24+6=.32ᦑᫀy.ூ௃⚪ᵨᑮḄᭆ᳛=ᡠᦪᦪ!".14ஹ18ூ᪆௃%&'Ḅ()*%ᩩ,-Ḅ./᪷1,-Ḅឋ3/SAACD=SABCD;4ᑭᵨ678ᳮ⌮8ᳮ;
?ABCDḄ@/AABCDḄ☢C.ூ௃,•,G*AABCḄ()/:.DE=GD=>GC=2,CD=3GD=6,2■:GB=3,EG=GC=4,BE=GA=5,.BG2+GE2=BE2,ᓽBGLCE,

9,:CD
4ABCḄ,-/•*,S«AC0=SABCD1,•t,S«ABC=SjcD+S.BCD=2sA8co=2xὡxBGxCD=18cm.ᦑᫀ18.ூ௃ὃI%&'()Ḅឋ3/,-Ḅឋ3/JKḄឋ3/678ᳮ⌮8ᳮL/Mᔠឋ"OP/QRS⌕O@.15ஹx0U஺ூ᪆௃WᦪXYZḄ[\^/_*Wᦪ᪆`ᨵbcḄᩩd/᪷1ᑖ`ᑖfg0Ḅᩩd/⌕hᐸᙠkᦪ^ᑁᨵbc/mnx+340=x=-3஺16ஹூ᪆௃oᔠp'qrstuv,ᓽstᐸ☢CwḄx᎛/z◤|☢C}~ᒕḄ☢C.22244ூ௃:`=1-——=——=1--25625628ᦑᫀ1-ூ௃⚪boᔠp'Ḅ☢CᑮstḄuv:ᐸ,Ḅ☢CwL☢C}~ᒕḄ☢C.17ஹ5ᡈ1.ூ᪆௃ᐜ1678ᳮ
ABḄ/ᯠᵫᢚḄឋ3AAB=5,DB=DBSᩭᑖNBDE=90஺wNBED=90஺,?p'/DB=DB=x,ᯠ1678ᳮᑡ?ᐵxḄuᓽA.ூ௃ORtAABCᱏ,,ZC=90°,AC=6,BC=8,.AB=5,VADᢚABDᢚ
ᑮABD,.,.BD=DB',AB'=AB=5.

10᝞p1ᡠ¢£NBDE=90஺x/¤B¥BFAF,ᚖ§F.BBD=DB'=x,¨!]AF=6+x,FB'=8x.ᙠRtAAFB,,ᵫ678ᳮ
:ABr5=AF5+FB5,ᓽ(6+x)5+(8-x)5=55.
xi=5,xs=O(¬~).ABD=5.᝞p5ᡠ¢£NBED=90஺x/CE(ᔠ.BVAB=5,AC=6,ABE=5.BD=DB=x,ᑣCD=8x.ᙠRtA'BDE,,DBr5=DE5+BrE5,ᓽx§=(8-x)5+55.
x=l.ABD=1.M¯ᡠ°/BDḄ5ᡈL%ஹ⚪(ᐳ7⚪/²ᑖ69ᑖ)18ஹ(1);<³᪆´(2);(3);<³᪆.5ூ᪆௃ᑖ᪆:পᵫAB=ACNABC=NACB,ᵫLῪ%&'%-ᔠAM_LBC,=>᪷1NMAB+NABC=NEBC+NACBNMAB=NEBC,4ᵫMBNLῪ·&%&'NEBC+NNBE=NMAB+NABN=NMNB=45஺A
;´

11(2)BM=CM=MN=a,DN=BC=2a,;4ABN^ADBN
AN=DN=2a,RtAABM,ᑭᵨ678ᳮA
aḄ\,=>
?ᫀ´MFMN1(3)F*ABḄ,MF=AF=BF¸NFMN=NMAB=NCBD,4ᵫ——=——=ᓽA
;.A.BBC2(1)VAB=AC,.•.ZABC=ZACB,TMBCḄ,/.••AM±BC,ᙠRtAABM,/ZMAB+ZABC=90°,ᙠRtACBE,/ZEBC+ZACB=90°,.,.ZMAB=ZEBC,ºMB=MN,/.MBNLῪ·&%&'/.•.ZMNB=ZMBN=45°,:.NEBC+NNBE=45஺/ZMAB+ZABN=ZMNB=45°,ANNBE=NABN,ᓽBN»ᑖNABE(2)BM=CM=MN=a,•.•¼½'DNBC*»¾¼½'//.DN=BC=2a,ᙠ4ABNwADBN,/AB=DB•••

12.,.ZMAB=ZFMN,¥TNMAB=NCBD,.*.ZFMN=ZCBD,..MF_MN1,ABBC2MFMN1••-------BDBC2/.MFN^ABDC.<=b⚪⌕ὃ¦§VḄ¨ᔠ¤⚪
⚪Ḅᐵe$ª«cῪIVIᔠḄឋஹ®IV¯°±VḄឋ£ᐰcIV[¦§IVḄᑨ[ឋcXY<.19ஹ´µᳫ·ᙢ☢Ḅ¹º»1¼.ூ
᪆௃½AD_LBC¾CBḄ¿ÀD,yADx,⊤ÂDBDC,᪷|fᑗḄᭆÄDxḄᓽ,.ூ
௃
½AD_LBC¾CBḄ¿ÀD,ᵫ⚪UZABD=45°,ZACD=35°,ᙠRtAADBNABD=45°,DB=x,ᙠRtAADCNACD=35஺,AD•*.tanZACD=-----CD.x_7"x+ioo-To'
xH.´µᳫ·ᙢ☢Ḅ¹º»1¼.ூ<=௃ὃḄ$
®IVḄᵨᳮ
ÈÉḄᭆÄஹª«┦IᦪḄᭆÄ$
⚪Ḅᐵe
RTUfg½ËÌ᪀⌼®IV.20ஹÏ
᪆

13ூ᪆௃ᵫÂ'Ḅឋ3A
84=3C,ZA=ZC,ᯠ᪷1&&½ᑨ8AABE%Ä?Å/Æ>
ᑮAE=CE.ூ௃;<•.•Â'A8C஺/:.BA=BC,Z4=NC,VBELAD,BFLCD,:.NBEA=NBFC=90"ᙠ/XABEVC5Ç,/ZBEA=ZBFC♦NA=/C,BA=BC
.AABE*CBFQAAS),
.AE=CF.ூ௃⚪ὃIÂ'Ḅឋ3wᐰL%&'Ḅᑨ8ឋ3/᪷1Â'Ḅឋ3
ᑮᐰLᩩd*⚪ḄᐵÉ.21ஹ(1)1(2)ÊH(3)x=§x/yᨵᨬᜧ\/ᨬᜧ\=Í.733ூ᪆௃(1)z⌕;

14BB1•0B=4,ZABO=30°,.OA=OB=2,AB=y/3OA=2y/3,•"•SAAOC——*OA*AB——x2x2yf^=2-^3•22VABOC$cIV.NOBC=1°,AABC=ZABO+ZOBC=90°,•••4C=^AB2+BC2=2s/஺Ç=ï/=°=⏀AC2s7Q(3)জOVxV—RMᙠOCMÑÒNᙠ஺8MÑÒ>R0

15B½H.ᑣBM=S-1.5x,M"=3Msinl°=—(8-1.5x),21,+23..y=-xONxMH=2x=|Ryᨬᜧy<¥ঞ4VØ4.8RMஹN#ᙠ8cMÑÒ,4OGLBCG.MN=12-2.5x,OG=AB=2y[3,I,h.y=-MNOG=12V3-x,22x=4Ryᨵᨬᜧᨬᜧ=26.¨MᡠÙyᨵᨬᜧᨬᜧÚ.3ூ<=௃b⚪ὃÛÜoᣚ¨ᔠ⚪ஹ3()ºḄ®IVḄឋஹcIVḄᑨឋஹIVḄ☢~cXY
⚪Ḅᐵe$Þ9ᵨᑖßàáḄâãâὃ¤⚪.22ஹ1ூ
᪆௃✌ᐜæ᦮ᦪᢣᦪéê¯ëìCᓽ,.

16ூ௃=9-3=1.ூ௃⚪⌕ὃᦪᐵ!"᦮ᦪᢣᦪ%p&'᦮ᦪ).a'23ஹ-4-75-1.ூ᪆௃ᐜ⌲⚗ᓄ01ᔠ345⚗ᡈ4578᪷ᓽ;.ூ௃=-3^5-(?-2)-12=-375-V5+2-12=-475-1.ூ௃@⚪ὃᦪḄBᔠCD!ᱯFGḄHGIᦪJ78᪷ḄឋLMN"᦮ᦪᢣᦪOḄPQR@⚪Ḅᐵ.2124ஹ(1)-(2)STUᦪVWX3ḄYᦪḄᭆ᳛&\.33ூ᪆௃(1)ᙠ᪗ᨵᦪV1ஹ2ஹ3Ḅ3U`ab᜻ᦪḄᨵ1ஹ3S2U᪷dᭆ᳛e;fg(2)ᵨᑡ⊤kᑡlᡠᨵno1pᭆ᳛.ூ௃(1),ᙠ᪗ᨵᦪV1ஹ2ஹ3Ḅ3U`ab᜻ᦪḄᨵ1ஹ3S2U2•••ᢣ┐ᡠᢣᡧubḄᦪV᜻ᦪḄᭆ᳛&§,2ᦑRᫀ&(2)ᑡ⊤᝞z:1231(1,1)(2,1)(3,1)2(1,2)(2,2)(3,2)3(1,3)(2,3)(3,3)

17ᵫ⊤,Xᡠᨵc,Ḅᦪ9.ᐸ6î2ᦪï\$3ḄðᦪḄᨵ3.,31ᡠL6î2ᦪï\$3ḄðᦪḄᭆ᳛.ூ<=௃b⚪ὃ᪶XY<Dᭆ᳛.
⚪ᐵe<ᑡᡠᨵòóᭆ᳛d.