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2.11.2.1.,2.,:1..2..1.23()3.1.2..3.0;,,...4..1x).(l()(2()(3()(4()(5)()62abc(1)=,=,=;(2)=,=,=;(3)=,=,=;3m(1)y=,m=,y=;(2)y=,m=,y=;(3)y=,m=,y=.4(l(2(351,2,.613.24cmcm2.71(2)8ABCD312-841235y=ax+bAB31y=x2AB(1)(2)CABC6v(km/h)s(m)s=v2s=v2.(1)70km/h(2)60km/h80km/h()(3)1.(1)(2)(3)452.1233.m4.x=14x=2-55.2cm4AE=BF=CG=DH=x(cm),EFGHy(cm2),1yxx2x0.250.51.51.75EFGHABCGDEFH31006005(1)??(2)x?(3)yyx1y=k=______x______yx2y=21x2012______.3=mx2=nx2xmn_____().mn0m0n0m0n0mn04y=ax2A(9)______.y=2x2____________.6y=x+2y=x21y=ax2(a0)aA.B.C.D.2y=ax2(a0)(a8)aA.2B.2C.2D.3h=gt2(g)htA.B.C.D.A.y=ax2B.C.D.x0yxy=ax2(a0)y=(a1)x2(a1)y=2x+a2(a0)y=xA.1B.2C.3D.4A.y=3x2x0yxB.y=6x2x=0yC.aaD.ay=ax2(a0)y=x2y=2y=x2A.B.xyxC.yyxD.yxy=(a+1)x2aA.a1B.a1C.a1D.a9y=xy=2x2A.(0)B.(C.()(00)D.(00)1P42..56BA