2022-2023学年河南省汤阴县数学八年级上册期末预测试题含解析

《2022-2023学年河南省汤阴县数学八年级上册期末预测试题含解析》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。

2022-2023
ᦪᔁ⚗1.⚪ὃᐜḄஹὃ!ᑏ#$ᩩ&ṹ()*ᙠὃ,-ᩩ&ṹ)*.஺2.⌱1⚪234ᵨ2B67!89:⌱1⚪234ᵨ0.5;<=⁐?@ḄA?7Bᑏ,?DE᦮ஹ7@#$஺3.Gᢥ᯿⚪JKᙠᔜ⚪MḄ⚪.NᑁPQR⚪.NBᑏḄᫀTᦔ9ᙠ₝WXஹ⚪ᔁ⚪Tᦔ஺4.Yᢝᓱ☢#]^⌕ᢚa^⌕bẚஹbd^4ᵨ8ᦋfஹghiஹjXᑐ஺lஹ⌱1⚪mno⚪3ᑖᐳ30ᑖr1.uP-2,-3ᐵwxxḄyzu{mrA.-3,-2B.2,3C.2,-3D.—2,32.|ᑡ~^h(ḄA.l“20”◚&ᡊᔜḄᵨ᪵B.lᦪ2,2,3,3,3,4Ḅᦪ3C.᝞xiX2Ḅᙳᦪ4,xi+1X2+5Ḅᙳᦪ7D.lᦪ1,2,3,4,5Ḅ2,ᦪ11,12,13,14,15Ḅ23.᝞᪷¡¢£&ABCDḄ☢¤¥¦~§|ᑡ¨©ª«ᡂmDA.(6/+b)°=cr+2ab+h~B.(a—b)~—ci~—2ab+b~C.(a+/?)(a—/?)—a~h~D.a(a+b)=a2+ab4.|ᑡᫀ®®¯yz&°^xyz&ḄmrA.B.C.D.5.±ABCḄ²©⚔uᙶ᪗Ḅ¶ᙶ᪗·¸¦-1,¹Yᢝºᙶ᪗^»ᑣᡠ¾&¿&ḄᐵÀmr

1A.ᐵwxxyzB.ᐵwyxyzC.ᐵw¿uyzD.¿&ÁxxḄÂᔣÄÅ1©ᓫÇ6.᝞ᙠABC®ZC=90°,AC=4,BC=3,AAHCÈuA⌮Ê┐ÌÍ,4uCាÏÐᙠÑÒA3ḄuEᜐu3Ðᙠu஺ᜐᑣ8஺ÔuÕḄÖ×{()A.V10B.&C.3D.27.lØÙᦪy=3x+஻m஺{ÚᦪrḄÛÇwxx|ḄᑖÁxxÜᢚᑮXxÞlØÙᦪy=3x+6m஻{ÚᦪrḄÛÇwxxàḄᑖᡂ“V”áᢚÑâu0,1PxxḄãÑ/,åæ“V”áᢚÑᙠçÑ/|ḄuḄ¶ᙶ᪗xèé0ீë<3,ᑣ஺ḄìíïmrA.-8-\D.Z?<-88.ðñòóôõö÷Ḅçøù{0.000000203<æçøᵨúûᦪ⊤ý{m<.A.2.03X108B.2.03X107C.2.03X106D.0.203X1069.᝞A8CḄþᑖÑBE᜜NAC஺ḄᑖCENA=60°,ᑣZEḄᦪ

2EA.30B.35C.40JD.6010.ᑡᑮḄ!"#$%&ᑖ(Ḅ$()A.yz-2y+4=(j-2)2B.10*-5*=5*(2x-1)C.a(x+j)=ax+ayD.t2-16+3/=(Z+4)(f-4)+3f+ஹ-.⚪(01⚪3ᑖ#ᐳ24ᑖ)11.ᑖ(%&3a2—4=.12.ᑖ(%&3ab2-4ab+4a=.13.᝞5#ᙠAAbC7#ABஹACḄᚖ9:ᑖ;(ஹ<=>?஺#AZBACB>76°,ᑣNQBC=214.ᓄE:ḄGH$73-115.᝞5#AABC7#AB=AC,BC=6,I£KLᡝḄᕜO$11,>/#BE
ACE,Q?஺$Ḅ7?#R!!Af=16.᝞5#ZAOB=30°,஺஺:ᑖNAOB,PT஺஺U?#PO//Q4=OB>?

3V_1_஺4>£1,OD=4cm,ᑣDE*=.E17.?P5,—3
ᐵ>YZ[\Ḅ?p#Ḅᙶ᪗T.x+y=5k18.Aᐵ>x,yḄ+ᐗ`abc.-Ḅ(d$+ᐗ`ab2x+3y=6Ḅx—y=^K(#ᑣkḄeT.fஹ(g⚪ᐳ66ᑖ19.10ᑖhiᡈke1
hi:2a+3b
2a-b
l2
hi32x+y-l
2l3
ma=2,b=-8,c=5n#koᦪ&qr+^Ḅel2a52m-414
ᐜᓄE#uke3m+2-——
X——#ᐸ7m=--.m-23-m2Y4-11Ax120.6ᑖᐜᓄEuke3--+-^—~~;+—ᐸ7*=|.x-2x+ljx-1221.6ᑖᑖ&7#ᙠᑖ}ஹᑖ~$᦮&Ḅ#᝞Hᑖ}Ḅ`ᦪ>ᑖ~Ḅ`43x2ᦪ#\᪵Ḅᑖ&Tᑖ&.᝞#ᑖ&-1$ᑖ&.᝞Hᑖ}Ḅ`ᦪx+2x+4xX—4f>ᑖ~Ḅ`ᦪ#\᪵Ḅᑖ&TᎷᑖ&.᝞#ᑖ&-Y$Ꮇᑖ&.x+2x-1x—4+2
—66Ꮇᑖ&ᓄT᦮&ᑖ&Ḅ.᝞#-——=1——x+2x+2x+2x+11Ꮇᑖ&lᓄT᦮&ᑖ&Ḅ$______lX-12x—12
Ꮇᑖ&——ᓄT᦮&ᑖ&Ḅlx+123
Aᑖ&YḄeT᦮ᦪ#k᦮ᦪxḄe.x+122.8ᑖ1
7800+ᓝ&ᜧ¢⊤¤#⍝ᐹ⌱ᵨ©ª«⁐┶®¯°.±²©⁐¯°04ᐗlª⁐¯°02.5ᐗl³´800⍝ᐹᐳµ¶2420ᐗ#·¸«¹¯°ᔜ»¼½

4(2)᪥ᑜᑴ1000ᔡἝᱥ!.#ᨵᵬஹ'()ᔆ+,-./0ᔡἝᱥ.ᵬ)ᔆ12345640078ᔡἝᱥ20ᐗ:400,;56<ᑖᡭ>ᢚ@AB-.ᩩD▲ᑴ:FGᑮ᪥IJKLMNᡂ800@')ᔆ128ᔡἝᱥ18ᐗ:A◤Q400ᐗ.R3᪥S᪵U᣸-.+,WXYQᨬ[:ᨬ[\[]^23.(8ᑖ)`+¾,bcᦪdef^+ᐭᵨ+kḄl22m24.(8ᑖ)ᐜᓄp:mbl31஺3஺q(1Q+3)(1Q—3),ᐸsa=-1.25.(10ᑖ)t3(/n+n+2)(zn+n-2)-m(/n+4n).26.(10ᑖ)᝞v:AஹBஹCஹ஺ᙠxqy;:AF=DE,AF/7DE,AC=DB.bz3^ABF^ADCE.{ὃ}ᫀqஹ⌱⚪(8⚪3ᑖ:ᐳ30ᑖ)1ஹDூᑖ᪆௃ᐵxḄ:ᙶ᪗4:ᙶ᪗ᦪூ௃•P(-2,-3),ᐵxḄ(-2,3).ᦑ⌱D.ூ௃⚪⌕ὃ☢yᙶ᪗sḄ.¡⚪Ḅᐵ¢£¤¥Ḅᙶ᪗3(1)ᐵxḄ:ᙶ᪗x:ᙶ᪗¦ᦪ@(2)ᐵyḄ:ᙶ᪗x:ᙶ᪗¦ᦪ@(3)ᐵ§Ḅ:ᙶ᪗¨ᙶ᪗©¦ᦪ.

52ஹAூᑖ᪆௃᪷«¬᪵fᐰ☢Ḅ¯°ஹ±ᦪஹᙳᦪf³´Ḅᭆ!}ᓽ+.ூ௃Aஹq·◚¹ᡊ»Ḅᔜ½

6ூ7'௃᪷9Ḅឋ;<=⚔ᙶ᪗Ḅ?ᙶ᪗@AB-1,DEᢝGᙶ᪗HI,!?ᙶ᪗IᡂLMᦪ.ᓽᡠ<ᑮḄᩭḄᐵ4y
.ᦑ⌱B.ூU௃V⚪X!◤⌕[\Ḅ]Ạ⚪.ὃ`Ḅaᙠ4bcḄ[\d'eḄᐵf!g[Ḅhi\j.6ஹAூᑖ᪆௃klBD,ᑭᵨopqᳮstAB,ᯠ᪷9Ḅឋ;v-᪷9x0

71-byVI3x+b•.1+b\-b••-------VxV-------,33Tx()VxV3,/.b=-Lb=-8,.bḄ-80b£l.ᦑ⌱}A.ூU௃⚪ὃ`ᦪIᣚstᦪy=2x+bx
ᢚḄ'᪆!'⚪Ḅᐵf.8ஹBூᑖ᪆௃41ḄhᦪvBᑭᵨ¡b\ᦪ¢⊤¤¥axlO",¦ᜧᦪḄ¡b\ᦪ¢H¨Ḅ!ᐸᡠªᵨḄ!«ᢣᦪᢣᦪᵫᦪ®¯°±H²Ḅᦪ³´☢Ḅ0Ḅᦪᡠeq.ூ7'௃0,000000203=2.03x10ᦑ⌱}B.ூU௃⚪ὃ`ᵨ¡b\ᦪ¢⊤¤¦Ḅᦪ'⚪ᐵfᙠ4¥axlO",ᐸ"l<|a|<10,nᵫᦪ®¯°±H²Ḅᦪ³´☢Ḅ0Ḅᦪᡠeq.9,Aூᑖ᪆௃᪷9+ᑖµḄq¶v<᪷9=+Ḅ᜜+4¸HL¹Ḅºᑁ+Ḅyy+ᑖµḄq¶⊤¤tZDCE,ᯠ᦮ᳮᓽv<ᑮ¼ᐭᦪ9¾¿ᓽv<'.ூ7'௃'}BEᑖNABC,.NCBE=L/ABC,2VCEᑖÀABCḄ᜜+:.ZDCE=-ZACD=-(ZA+/ABC)=-ZA+-ZABC,2222

8ᙠ4BCE"ᵫ=+Ḅ᜜+ឋ;NDCE=NDBE+ZE=1NABC+ZE,.,.-ZA+-ZABC=-ZABC+ZE,222.-.ZE=-ZA.2-.-ZA=60°,.'.ZE=30°.ᦑ⌱A.ூU௃⚪ὃ`=+Ḅ᜜+ឋ;ḄÁᵨhiÂᵨឋ;ÃÄᳮy¾¿!'⚪ḄᐵfÅ0}=+Ḅ᜜+4y¸HL¹Ḅºᑁ+Ḅy.10ஹBூ'᪆௃᪷9Æᑖ'Ḅ0¶v<Çᫀ.ூ7'௃A.ᑖ'HhiᦑAHÉᔠ⚪0B.Ê⚗ᓄᡂ᦮ÍḄᦑ3Éᔠ⚪0C.!᦮ḄA¢ᦑCHÉᔠ⚪0D.ÎÊ⚗ᓄᡂ᦮ÍḄᦑOHÉᔠ⚪0.ᦑ⌱B.ூU௃⚪ὃ`Æᑖ'Ḅ0¶Æᑖ'!Ê⚗ᓄᡂ᦮ÍḄ.ÏஹÐÑ⚪(Ó⚪3ᑖᐳ24ᑖ)11ஹ(a+2)(a—2)sூᑖ᪆௃ᨵº⚗@ᑏᡂØᐰÚᦪḄDÛÉÜLMvᵨÚÝÞßà.ூ7'௃'}a2-4=(a+2)(a-2).ᦑÇᫀ}3+2)(°—2).ὃ}Æᑖ'-ÂᵨÞ¢.12ஹa(b-1)i.ூ'᪆௃ab1-4ab+4a=a(I?-4b+4)--(áÞÆ)=a(b-1)--(ØᐰÚÞ)ᦑÇᫀa(b-1)i.

913ஹ14°ூᑖ᪆௃klOA,᪷9ᚖ*ᑖµḄឋ;v

10ூ7'௃VAF1BC,BE±AC,D!ABḄ":.DE=DF!AB,2VAB=AC,AF_LBC,...F!BCḄ":.BF=FC=-BC=3,2VBE±AC,/.EF=-BC=3,2ᡝḄᕜð=OE++=AB+3=11,:.AB-8,ᙠñ♦ABE"AB2=BF2+AF2ᓽ82=32+AF2'<}AF=.ᦑÇᫀ}V55.ூU௃⚪ὃ`*+=+é¯êḄ"µ4é¯ḄëḄឋ;Ὺ=+=µᔠḄឋ;Bòopqᳮó\ᔜឋ;!'⚪Ḅᐵf.16ஹ2cmூᑖ᪆௃íPõPFJ_OB4F,᪷9+ᑖµḄq¶vXVPD/7OA,.•.ZDPO=ZAOP=15°,.PD=OD=4cm,VZAOB=30°,PD஻OA,ÏZBDP=30°,*q1ÏᙠRtAPDF",PF=-PD=2cm,

11TOC+ᑖµÛPE_LOA,PF±OB,APE=PF,/.PE=PF=2cm.ᦑÇᫀ}2cm.ூU௃⚪÷⌕ὃ`}(1)ø30஺öḄ*+=+Ḅឋ;}ᙠ*+=+"30஺+ᡠḄ*+¯4é¯Ḅë(2)+ᑖµḄឋ;}+ḄᑖµêḄᑮ+Ḅº¯ḄùúL.⚪û᧕åö〉"!⍝ÿᐺ
Ḅ⚪.17ஹ(5,3)ூᑖ᪆௃᪷ᐵxḄḄᱯᙶ᪗ᙶ᪗ᦪᓽ"#$%ᫀ.ூ'(௃)(5,-3)ᐵxḄPḄᙶ᪗(5,3)ᦑ%ᫀ(5,3).ூ+௃,⚪-⌕ὃ0ᐵxḄḄᱯ12ᐵxḄḄᱯ3(⚪Ḅᐵ4.318ஹ4ூᑖ᪆௃5k6789ᦪ:$x;y,<ᐭ2xᓝ3y=6?@Aᓽ"#ᑮkḄC.x+y-5k@ூ'(௃(x-y-9k@জᓝঝ#2x=14k,ᓽx=7k,5x=7k<ᐭজ#7kᓝy=5k,ᓽy=-2k,Fx=7k,y=-2k<ᐭ2xᓝ3y=6#14k-6k=6,3(#ii3ᦑ%ᫀG-ூ+௃I⚪ὃ0JKᐗMNOPQḄ(RSKᐗM-NOPḄ(OPḄ(ᓽTUOPVW

12«ᡂÀḄÁ²ᦪḄe.fஹ(g⚪(ᐳ66ᑖ)4+ஹÂ19>(1)4a*2+4ab-3b2(2)4x2+4xy+y2-4x-2y-1(3)----------(4)-2m-6,,2-5ூᑖ᪆௃(1)ᑭᵨ»⚗&Ï»⚗&à#ᯠ¾ᔠâᓽl(2)ᑭᵨãᐰ:aå&hil(3)ᐜhiæ^-4"ᯠ¾hioᦪ&Ḅel(4)ᐜçèéᑁëᑖ#uçᑖ}ᑖ~%&ᑖ(¾ìᑖíᑮÅ&=-26,ᯠ¾ç஻?Ḅeoᐭhiᓽ.ூî(௃(3(1)Å&=44-2"+6*-3/?2-4a2+4ab-3b2;(2)Å&=(2x+y)2—2(2x+y)-l=4x2+4xy+y2-4x-2y-ll(3)64ac=(-8)2-4x2x5=24,-b+\/b2-4ac8+2A/64+2aߟ2x2ߟ2#(4)Å&=0"+2)(-2)-52(m2)m—2in—3(tn+3)(/n-3)2(m-2)tn—2m—3=—2(஻?+3)=—2m—6>mm---n#Å&=-2x(--6=-5.22ூ?È௃Ê⚪ὃÌÍ»⚗&ÏÐஹᑖ&ḄᓄEkeÑoᦪ&ke.ÒÓ᦮&ÏÐᑖ&iÐᑣÔÕi$(⚪ᐵÖ.ூᑖ᪆௃᪷Ùᑖ&ḄÐÐᑣ◀ÐÐᑣᓄE⚪Û7Ḅ&}#ᯠ¾xḄeoᐭᓄE¾Ḅ&}ᓽ(gÊ⚪.

13(x+l)(x—1)+1x—1ூ'(௃(XY=(x-1)2Xx2x-1(X-1)2XX='x-i[x=2\,2XY=f-M12=-1ூ+௃,⚪ὃ0ᑖYḄᓄ_:C(%,⚪Ḅᐵ43`aᑖYᓄ_:CḄOb.2321ஹ(1)1+—l(2)2------l(3)x=-2ᡈ1.X-1x+\ூᑖ᪆௃⌮ᵨᑖfᑖYghbbᑣj᯿⚪l7(1)(2)l(3)ᐜnᑖYᓄoᑖY,᪷C᦮ᦪxḄC᦮ᦪaqxḄC.ூ'(௃((1)—=--n.+2x-1X—12ᦑ%ᫀ1+x-12.x—1(2x+2)—3x+1x+12(x+l)_3X+lX4-13=2------lx+12x(3)—x+1x2-1+1x+1V—11x+1x+1=x-1+—!—,x+l•.•ᑖYḄC᦮ᦪrX᦮ᦪ,

14•*.x+l=+1,.,.x=-2ᡈ1.ூ?È௃Ê⚪ὃÌÍᑖ&Ñᑖ&ḄùÐ.ᳮ(⚪⚪ÛûæḄüý$(þÿ⚪Ḅᐵ.22>(1)⁐280⁐520(2)᪥᣸ᙠᵬᔆ800ᔆ200ᵨᨬᨬ17600ᐗ.ூᑖ᪆௃(1)%⁐x⁐y᪷'()ᦪ+,-ᦪᑡ/ᐗ01234567(2)ᑖ892ᫀ;<=>জ%ᵬᔆx(0WxW400)ᵨ@w,ᑡAᦪᐵBCᑭᵨEFឋᑖ᪆ᨬHঝ%ᵬᔆx(400Vx4800)ᵨ@vv,ᑡAᦪᐵBCᑭᵨEFឋᑖ᪆ᨬHூJ5௃57(1)%⁐x⁐yᵫ⚪LMx+y=800ெ4x+2.5y=2420fx=2805M4[y=520':⁐280⁐520(2)জ%ᙠᵬᔆx(0WxW400)ᑣᙠᔆ(1000-x)ᵨ@w᪷'⚪L7P=20x+18(1000-x)+400=2x+18400V2>0.••wSxḄEᜧUEᜧVx=0WwᨵᨬYH@18400,ZWᙠᔆ1000ᵨᨬ@18400ᐗঝ%ᙠᵬᔆx(400VxW8()0)ᑣᙠᔆ(1000-x)ᵨ@w᪷'⚪L7w=400x20+20x0.7(%-400)+18(1000-x)+400=-4x+20800V-4<0•••wSxḄEᜧUFYVx=800WwᨵᨬYH@17600ZWᙠᵬᔆ800ᔆ200ᵨᨬ@1760()ᐗ[\ᡠ^᪥᣸ᙠᵬᔆ800ᔆ200ᵨᨬᨬ17600ᐗ.

15ூ+௃,⚪ὃ0MᐗKNOPQḄsᵨMNtᦪḄu▭sᵨ᪷⚪wxyz{ᐵ|3(⚪ᐵ4.o3+⌲0923ஹ--------22ூᑖ᪆௃~5ஹ஽<ᐭ,ᑖfᨵᳮᓄᓽ"ᐜ:#+ZḄC5x\X++X᳝+஽XlX2ḄYᓽ":(.ூ'(௃=]S=V5+1=(⌲+1)(⌲+1)=(75+1)26+2^=3+'᳝-1+V5V5—1(—1)(+1)(V5)2-1-42*..-1+V5-1-75-1+V5-1-V5,•X.+=-----------1-----------=----------------------=-1,12222-1++,-1--(-I)2-(>/5)2XiX^y=-------♦----------=-----------------=-1191-224X7+x)x+%2=(x+x,)—2=(—1)—(-1)=2.9ூ+௃,⚪ὃ0JKN᪷YḄᔠASḄ9ᨵᑖfᨵᳮᓄஹᐰOYḄsᵨஹOYḄsᵨ12KN᪷YḄAbᑣᐰOYḄ᪀ᱯ¡3(⚪Ḅᐵ4.24ஹ2a2+917ூᑖ᪆௃ᢥ᯿᦮YḄ£bbᑣᓫ⚗Y£Rᓫ⚗YஹOYSᔠ¦§⚗ᓄ_

16ூ`a௃b⚪ὃd᦮CḄfggᑣhigᑣjkẠmnᓄpjᐵ.25ஹn2-2mn-1.ூᑖ᪆௃᪷'r2stCu⚗Cfu⚗Cᓫ⚗Cfu⚗CḄx>gᑣ;ᓽ.ூJ5௃57|C=(/«+»)2-1-m2-Imn,=in2+2mn+n2-1-m2-\mn,=n2-2mn-1.ூ`a௃b⚪ὃd᦮CḄᔠx>5⚪ᐵjhir2stCu⚗Cfu⚗Cᓫ⚗Cfu⚗CḄx>gᑣ.26ஹJ5᪆.ூᑖ᪆௃ᐜ᪷'r<ḄឋNA=ND,ᑭᵨḄFMAB=DC,ᓽᵨ“SAS”ᐰ.ூJ5௃VAF/7DE:.ZA=ZDVAC=DB.,.AC-DB=DB-BCᓽAB=DCᙠAABF+ADCEAF=DE