2022-2023学年福建省泉州洛江区七校联考数学八年级第一学期期末检测试题含解析

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2022-2023
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ᑏJyxopḄ¢ᦪᐵqu.ூPA௃A*(1)WÙᔴÛḄÜÝ⊡ßàáâdëᐗ
ãäå⁚âd஻ᐗ.14?2+(20—14)n=494m+(18—14)n--42'm=2A*\cu
n=3.5b*ÙᔴÛḄÜÝ⊡ßàáâ2ᐗ
ãäå⁚âd3.5ᐗ.(2)x>14"
y=14x2+(x-14)x3.5=3.5x-21,ூ,௃

170⚪ὃ345ᐗ789:;78<ᦪḄ>▭@ᵨBC5ᐗ789:;78<ᦪḄ9DE⚪ḄᐵG.22ஹ(1)X2/%(2)a2+4a+4-b2;(3)100ூᑖ᪆௃(1)ᐜ᪷RSḄT9UVDᑣXYᦪSḄT◀DDᑣ[V\]^ḄT9UV,&᪷RXYᦪ`ḄaDDᑣVaDᓽb%(2)ᑭᵨ!9de]fg[Vᓽb%(3)ᑭᵨhᐰ!9e]fg[Vᓽb.ூ௃:(1)^=9x2y2.y2-4x2/-8x3/^2xy2=9x2y4-4x2y4-4x2y4=x2y4(2)\]=(4+2-஺r°+2+஺)=[(a+2)—Z?][(a+2)+A>]=(a+2)2-b2-cT+4஺+4-b2(3)\]=452+55?-2x55x45=(55-45}=100ூ~௃0⚪⌕ὃ34>ᦪḄUV᦮]Ḅᓄhᐰ!9e]!9de]BC>ᦪḄUV᦮]Ḅᓄhᐰ!9e]!9de]E⚪ḄᐵG.23ஹপA(—1,T),E(3,3),(4,4)%(2)▤ḄE10,AMḄE10ᓛூᑖ᪆௃(1)᪷R!☢ᙶ᪗Ḅᯠ+ᑏᔜḄᙶ᪗ᓽb%(2)ᑭᵨ!Ḅឋ¡ᔣ£¤ᔣḄᯠ+ᓽb.ூ௃3ᙶ᪗\¥!9ᔣx¦!☢ᙶ᪗᝞,ᡠ©.(1)E(3,3),*4,4)%(2)8Ḅᙶ᪗E(0,0),CḄᙶ᪗E஺,1),.•.▤▤Ḅ1,®¯1.

18.•.10▤ð▤Ḅñd1().AM=V102+102=V200=10A/2-ᡠ}
òð▤ḄñO1(),AMḄNO10ᓛ.Mூ,௃.⚪ὃ01ᙶ᪗Ḅឋ

19.,.ZB=ZC.Bூ௃⚪ὃḄᑨឋᱞᔜḄᑨᳮឋᳮ⚪Ḅᐵ.26ஹ(1)300,75,60(2)j=100x-150(3ᵬஹ@AᙢḄCDE᪷789:=4ஹ8Aᙶ᪗ᯠGᑭᵨJK=01++NOᓽ:E(2)᪷7,-QR1*+:=Eᙶ᪗᪷7,-S᠒-TU0.5*+ᑮWXḄᙢ:=Cᙶ᪗ᯠGᑭᵨYZᦪ\Oᓽ:E(3)᧕=^x_NḄ`ᦪᐵZaᯠGb⌕O;EC;dḄeᓽ=fᙶ᪗"gb⌕ᵫ;EC;ḄḄ᪆aiᡂḄk1iᓽ:lm:=Ḅ%▭'(.ூn௃o(1)ᵬஹ@Aᙢ2C300ᓟq,-QRUḄḄJK"o150+2=75ᓟq/*+᠒-ḄJK"o150+2.5=60ᓟq/*+.ᦑtᫀ":300,75,60(2)ᵫ⚪':=EḄwᙶ᪗"o2+1=3,ᑣEḄᙶ᪗"(3,150),,-yEᑮCᵨḄ+N"o300+60-0.5=4.5(*+)ᑣCḄᙶ᪗"(4.5,300),{|ECᡠ⊤~Ḅᑘx_NḄ`ᦪ⊤Wayi=h+6,EஹCA#ᐭ=o4.5k+Z?=300,=1003k+b=l50,=o150,ᓽ|ECᡠ⊤~Ḅx_NḄ`ᦪ⊤Wa=100x-150(3

209Ḅᙶ᪗ᱯA`ᦪḄe3ὃ⚪89Rஹ`ᦪḄ2ᐵ⚪Ḅᐵ.