2021-2022学年吉林省长春市榆树市八年级下学期期末数学试卷

《2021-2022学年吉林省长春市榆树市八年级下学期期末数学试卷》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。

2021-2022
ᔡ᪍ḕ᧡ᭊ᪛
ᦪᔁஹ⌱⚪⚪3ᑖᐳ24ᑖ2i.ᑡ"#$1.&'L_3ߟᐸ.ᑖ"Ḅᐳᨵx2x+yA.12B.22C.32D.422.56ᦪ"77ᙠ9ᦪ;ᑁᨵ=>ᑣxḄAB;Cx-3A.x=3B.x#3C.x>3D.x<33.5EFa,2ᙠI'J▲ᑣ஺ḄBMNCA.-2B.0C.1D.24.TUVWᦪy=1+2ᵨx-3.WᦪBy\]^_xḄ`ᜧbcdeḄAB;CA.-—B.-—C.m<--D.w>—22225.j᪥⌕mnop.⌱qors“uvwx”ᜧz⌱qz.opḄ{ᙳᡂ~Wᐸ52᝞⊤ᡠ᝞⌕⌱oᡂ~ᢵḄprzᑣ⌱ḄpCᵬX89982S111.21.3A.ᵬB.C.D.T6.᝞ᙠ{☢ᙶ᪗.0/8CḄ⚔E/Ḅᙶ᪗¢-2,1,⚔E8ᙠy£¤¥£¦ᑣ§2⚔ECḄᙶ᪗¢)A.(-2,-1)B.(-2,1)C.2,1D.(2,-1)7.᝞ᙠ45CD.ZZ>=140°,ᑣN1Ḅᜧ¢)

1DCBA.15°B.20°C.25°D.30°8.᝞®y=x+b°®y=Ax+4±²E2,&,ᑣᐵ²xḄµ¶"x+b>fcc+4Ḅ333333'ஹ¹º⚪⚪3ᑖᐳ18ᑖ9.2022°=.10.ᑖ"'»—'Ḅᨬ¾¿ᑖÀC_____.2xy3x2y11.ÁÂÃCÄᙠÅƦᨬↈḄÈÉᩞᧇᐸᳮÍÎÏÐC0.00000000034m,Ò2ᦪᵨÓÔᦪÕ⊤¤ÖḄCm.12.᝞ᡠEPᙠØÙÚWᦪḄJ¦ÛFEÜ£²4EÜ£²8EÝ0/1P8Ḅ☢Þ¢9,ᑣßØÙÚWᦪḄà᪆"¢.13.᝞ᙠ/8C஺.â®ZC°5஺ã±²EO,OEYAB,ᚖ梣,N4DC=130°,ᑣNNOEḄᜧ¢.

2D14.᝞®y=-£+4°x£ஹy£ᑖé±²/ஹ8êEëìEíîï┐ñò390°óôᑮö402,ᑣE᜛Ḅᙶ᪗C.&ஹàø⚪(ùᜧ⚪ᐳ10⚪ᐳ78ᑖ)15.àú$x-22-x216.ᐜᓄ¾ýþB$(17-).ᨴ
L,ᐸ“=3.a+22.a417.Iᦪ᜛=+6(AW0)Ḅ#$%&/(2,5),B(1,3))*.(1)+,ᦪḄ⊤./0(2)+,ᦪ#$1x3Ḅ4*CḄᙶ᪗.18.9:;<ᑮ>?200@ABḄCDᙠ>?F40@GᵫIᦋKLᢈNOᜩ>?ḄABᦪQRSᩭḄ2.5U᦮@>?&WᐳᵨL13ᜩFᡂ.+SᩭOᜩ>?ABḄᦪQ.19.᝞#ᙠ]48C4B=AC,AD1BC,ᚖ_`*஺4NR]A8C᜜dḄeᑖgCELAN,ᚖ_`*E.(1)+ijkl4OCE`nl0(2)o°qjkl4OCER@rsl.

3.VE20.#জஹ#ঝᙳ`7X6Ḅrslyz*/ஹBஹCᙠz*{.ᢥ⌕+ᙠ#জஹ#ঝ~*஺ஹBஹCஹ஺`⚔*Ḅjkl.#জ#ঝ⌕+(1)*஺ᙠz*{BஹCஹ஺`⚔*Ḅjkl`#l0(2)ᡠḄ)@jklᐰ
.21.“”.`L;DḄq;9(1)¡¢ᦪ£Ḅ¤ᦪRq¥ᦪRq.(2)+¦§OᕜDḄeᙳq;.(3)©ª᪷£(1)ஹ(2)Ḅ¬ᵨ®¯°°±²Ḅ³´.22.᝞#ᙠe☢¶dᙶ᪗·UU8CDḄ⚔*/ஹ8ᙠx3Ḅrº3{⚔*஺ᙠy3Ḅrº3{ᦪy=K(x>0)Ḅ#$%&*C,*4ஹBஹ஺Ḅᙶ᪗ᑖ¾`(2,0)ஹx(8,0)ஹ(0,4).(1)+/Ḅ¿.(2)ÀÁ/BC஺Ãy3ᔣ{eÅoeÅGḄ*5Æᙠᦪy=K(x>0)Ḅ#${q,X+eÅGḄkCD1¦ᦪ#$Ḅ4*ᙶ᪗.

4iÇ:ூឋËÌᵨ௃᝞#ঝÎḄdgNCஹ8஺Ï4I*0,EF&*஺18cᑖ¾Ï4I*£■ஹF,(1)+iOE—OF2
Ò¬4ÓEFUC,Z8/ᕜÔR15,ᑣÎM8C஺ḄᕜÔR24.ᵬஹ×)ØÙ>ÚMᙢᑮNᙢḄÜÝÔÞßà)ØᙠßàqᡠÞḄáWyâÝã1q;xᑖãä;Ḅᦪᐵ·᝞#ᡠ橪᪷£#$çèéᑡë⚪:

5(1)ᵬḄíîRÝ/ᑖ×ßᵬïðᑖᐜᑮ.ò*.(2)+×ᡠÞḄáWy1q;xä;Ḅᦪ᪆/.(3)¶<ᑏᵬஹ×)ØÏ⍗qᡠᵨḄq;.

6ᭊ᪛2021-2022ᦪᔁὃᫀஹ⌱⚪⚪3ᑖᐳ24ᑖ1.B2.B3.A4.C5.B6.C7.B8.Aஹ⚪(⚪3ᑖᐳ18ᑖ),,99.110.6xy311.3.4x10-'012.y=-13.65°14.(7,3)x'⚪ᜧ⚪ᐳ10⚪ᐳ78ᑖ15.øᑖùú2x=x-2+l.â2ᑖãúx=-1.â3ᑖãüoý=-1qx-2^0.â4ᑖã?=-1RSsWḄâ5ᑖã16.S/=a+2_lxa+2S2=£^2.4ᑖtz+2a+1-a+\3-21a=3===,.6ᑖ3+1417.1ᵫ⚪!42,5,51,3#ᐭy="+6'(0,*5=2'+b,-.,,,-'=2/=1,3=k+bᡠ1234ᦪḄ⊤89y=2x+l:3ᑖ2!y=0#ᐭy=2x+l,-x=-g,ᡠ1234ᦪ<=>x?Ḅ@ACḄᙶ᪗9-E,..3ᑖI218.GᩭIᜩKLMNxO.1ᑖ᪷Q⚪-R+®=13.3ᑖx2.5x-x=85ᑖUVWx=8XYZḄ[\ᔠ⚪.6ᑖ^ᩭIᜩKLMN8O.7ᑖ19.(1)bcᙠaABCgAB=AC,AD1BC,.•.ZBAD=ZDAC,1ᑖ

7
ANXAABC᜜l/CAMḄmᑖn,ZMAE=ZCAE.2ᑖ/.ZDAE=ZDAC+ZCAE=-ZMAC+-ZCAB=-xi80°=90°,3ᑖ222oAD_LBC,CE±AN,NADC=NCEA=90°,4ᑖ•pqrADCE9sr.5ᑖ2
90°,2ᑖ20.᝞<জpqrABCDᓽ9ᡠw;᝞<ঝpqrABCDᓽ9ᡠw.IO<ᔜ4ᑖᐳ8ᑖ21.1
2.5
2.5.IO|ᔜ2ᑖᐳ4ᑖ2
}~IᕜḄmᙳ9ᔁ*0*1+1x4+1.5x7+2x8+2.5x12+3x10+3.5x6+4x2
=2.393ᑖ1
2
,1(}~IᕜḄmᙳ.1ᑖ22.পᙠABCD,A2,0
,B8,0
ஹD0,4
,AB=CD,AD஻CB,1ᑖ.CD=8-2=6,2ᑖ.♦.ACḄᙶ᪗96,4
,3ᑖ•.•4ᦪJ=Ax>0
Ḅ

8UABCDᔣm3Oᓫ3ᑖmADḄᙶ᪗90,7,4ᑖ24y=7x=—724.♦•mḄqCD>}4ᦪ<Ḅ@Aᙶ᪗947
5ᑖ723.ூᦟᩞᕈ¢௃bc•.•pqrABCDXm¤pqrAAB//CD,AB=CD,1ᑖ.,.ZBAO=ZDCO,ZABO=ZCDO,2ᑖ.♦.¥AOB¦¥COD,3ᑖ:.OA=OC,OB=OD:4ᑖூឋ¨©ᵨ௃1
bc•••pqrABCDXm¤pqrZ.OA=OC,AD஻BC,1ᑖ•••ZOAE=ZOCF,2ᑖXVZAOE=ZCOF.,.¥OAE^AOCF3ᑖ.,.OE=OF:4ᑖ2
30.2ᑖ24.1
^ᫀ9:250:8.IO|ᔜ2ᑖᐳ4ᑖ2
0x¶Ḅ4ᦪ᪆9y=500x—6000(20YX432)’3
GºUxᑖ»³>ᵬ½⍗ᵬᡠ´ḄµZy>x¶Ḅ4ᦪ᪆9¯=¿^Xᓽy=250x:

9ᵫ⚪-250x=500x—6000,-x=24.^ᵬஹ³ÀÁ½⍗ᡠᵨḄ924ᑖ.3ᑖᜓÃ1.ÄᵨÅÆὃ^ᫀ1᜜ḄÈÉ⌕ËÌᙳᢥÎÏÐᑖ஺2.1^ᫀ᝞ᨵÓ⚪ÔÕ¤ÖË!ØÙÚᦪ^ᫀÛ2⚓ᐳ2⚓