2021-2022学年湖南省永州市九年级（上）第二次限时训练数学试卷（附答案详解）

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2021-2022
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5,1,ᦑCᫀË5,1.=8ºBE1x¢\E,᪷ÌWḄឋvMᑮCO=AB,ADAB=90°,᪷IJḄឋvMᑮ=4rM0,᪷`ÆKJWḄឋvMᑮ4E==2,BE=^0A=1,\RMᑮ¶Ê.!⚪ὃ$%ÌWḄឋv`ÆKJWḄᑨPឋvᙶ᪗WឋvÍḄº,Á¦RF⚪Ḅᐵx.15.ூCᫀ௃0-12=6

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14ூ᪆௃;⚪⌕ὃ᪷¦~ᦪḄᐵ~ஹ᪷Ḅᑨn,⚪ḄᐵÄ,ᐰ"#/+px+q=oḄÀ᪷TÆ1+ᡭ=-p#xix2=q-(1)᪷@᪷Ḅᑨn,/=(2m+I)2-4X1X(m-2)=4m2+9>0,@aᫀk(2)᪷@᪷¦~ᦪḄᐵ~X]+X2=-(2m+1),xx=m-2,ᐭ/+È+3X1È=1x2ᐵJ஻Ḅ"#Êaᫀ.25.ூᫀ௃ᙠRtAM4CËtan4M4C=Ì,MCᑣAC=ÍNÎ,tar\Z.MACNMBC=45°,ᑣBC=MC,•••AB=40N•••V3MC-MC=40,MC=£^=20(Ï+1)N•••MF=MC+CF=20(g+1)+1.5=56.1(N)MFḄÐÑ$56.1N.ூ᪆௃᪷@ᑗḄÓᵨMC⊤ÕAC,᪷@|ῪI[ḄឋᑮBC=MC,᪷@⚪lᑡ"#"#ᑮᫀ.;⚪ὃḄI[Ḅrᵨ-ÙÚ«⚪ÙÚḄᭆÜஹÝÞ┦¢ᦪḄÓ⚪Ḅᐵ.26.ூᫀ௃(1)74(<1,஺)ᙠ¡¢ᦪஹ=^Ḅ¤¥³•Q=6,>A(T6),•8(0,5),•GIáABḄ᪆,$y=fcx+5,••IáAB4(-1,6),•6=—k+5,A=-1,IáABḄ᪆,$y=-%+5*(2)âIáABᔣäbå6Áᓫç¹ᑮIáCDḄ᪆,$y=-x-l,•:.BD=5+1=6,è,•♦IáCQ¦¡¢ᦪy=?0JCஹ£À,

15ὶëtìTᖿ>3ᡈï13#C(-3,2),E(2,-3),ðñBC,ᑣBCDḄ☢`=gx6x3=9,ᵫbáòḄóôᜐᜐ|aö4co¦48c஺☢`|ACDḄ☢`$9.(3)vC(-3,2),E(2,-3),&|,mx+n2.Xூ᪆௃(1)â4(—l,a)ᐭ¡¢ᦪy=?)஺Ḅ½AḄᙶ᪗᪷@¬~ᦪ9,ᑣADABrrr|AD5—=—,ᓽ6=ABAC54

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