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12yaxbxcabc0a0abc2.2yaxbxcxx2abcabc1.2yaxa2.2yaxc3.2yaxha0a00y0xyx0xyx0xy00a00y0xyx0xyx0xy0a0a0cy0xyx0xyx0xyc0a0cy0xyx0xyx0xyca0a0hX=hxhyxxhyxxhy00a0hX=hxhyxxhyxxhy04.2yaxhk1.2yaxhkhk2yaxhk(h0)(h0)|k|(k0)(k0)|k|(h0)(h0)|k|(h0)(h0)|k|(k0)(k0)|k|(k0)(k0)|k|y=a(x-h)2+ky=a(x-h)2y=ax2+ky=ax22.hkcbxaxy2y:mcbxaxy2mcbxaxy2mcbxaxy2cbxaxy2mcbxaxy2cmxbmxay)()(2cmxbmxay)()(22yaxhk2yaxbxc2yaxhk2yaxbxc22424bacbyaxaa2424bacbhkaaa0ahkX=hxhyxxhyxxhyk0ahkX=hxhyxxhyxxhyk2yaxbxc2yaxbxc2()yaxhk.y0c0c2hcx10x20xx.xy.2yaxbxc1.0a2bxa2424bacbaa2bxayx2bxayx2bxay244acba2.0a2bxa2424bacbaa2bxayx2bxayx2bxay244acba1.2yaxbxcabc0a2.2()yaxhkahk0a3.12()()yaxxxx0a1x2xx.x240bac.1.a2yaxbxca0a0aaa0aaaaaa2.bab0a0b02bay0b02bay0b02bay0a0b02bay0b02bay0b02bayabababx2y0aby0ab3.c0cyxy0cyy00cyxycyabc1.2.3.x4.1.x2yaxbxcx2yaxbxc2yaxhkx2yaxhk2.y2yaxbxcy2yaxbxc2yaxhky2yaxhk3.2yaxbxc2yaxbxc2yaxhk2yaxhk4.1802yaxbxc222byaxbxca2yaxhk2yaxhk5.mn2yaxhkmn222yaxhmnka1.x20axbxc2yaxbxc0y.x240bacx1200AxBx12()xx12xx200axbxca2214bacABxxa.0x0x.1'0axx0y2'0axx0y2.2yaxbxcy(0)c3.x2yaxbxcabcabcx.2(0)axbxcax0a1x2)2(22mmxmym2bkxy12bxkxyyyyy110xo-1x0x0-1xABCD3(0,3)(4,6)35x42yaxbxca0x13y3212.5112yaxbxc1),(acbMABCD2y=ax2+bx+ca02?abx=1x=34a+b=0y=-2x0.0x0x0x.A1B2C3D4(1)(2)abc2.y=ax2+bx+cx(-2O)(x10)1x12y(O2)ab02a+cO4a+cO2a-b+1O()A1B.2C.3D43.xax2+bx+c=3x=-2y=ax2+bx+cx=2()A(2-3)B.(21)C(23)D(32)4mABC2/LABCDxym21yx2x=23.5y3.5y=12x2+x-5212xABAB126cbxxy221Ac2x=312[]1cbxxy221Ac2x=3,3212,2212bcbcc.2,3cb.23212xxy2y=0023212xx.53,5321xxx3+)0,5x).0,53(x=3,25y23212xxy),25,3()25,3(14ABCDEAF=2BF=1ABPPNDM210x?yx152030y252010yx1yx2?1y=kx+b1525,220kbkbk=-1b=40?y=-x+402xww=x-1040-x=-x2+50x-400=-x-252+225252251?2?1.247yxx()A.(2,11)B.27C.211D.232.22yx1A.22(1)yxB.22(1)yxC.221yxD.221yx3.2ykxk(0)kykx()4.2(0)yaxbxca,:a,b;1x3x,;40ab2y,x0.()A.1B.2C.3D.45.2(0)yaxbxca-1-3.2(),x20axbxc121.3xx.B.-2.3C.-0.3D.-3.36.2yaxbxc(,)acbcABCD7.222xxxA.0B.1C.2.38.A(2,0),B(-1,0),yC,OC=2.A.22yxxB.22yxxC.22yxx22yxxD.22yxx22yxx923yxbx2xb_______10y=-2x+32+5yxx_______.1112x0yx1222(2)6yxC3ykxC13.2241yxx22yxbxc1,2,b=,c=141640ABM5(3.14).15.30x,(1,-6),y(0,52).(1);(2)x,0?(3)x,yx?1516.ht2012hvtgt0t2g10/2v0=20/11521.51.8.17.2yxbxc3yxABxCD.12PAPCSACDS54P18.26045107.5100xy12402yxx341A2C3A4B5D6B7C8C94b10x-311224,24yxyx12113-87141515(1)2bxcyax,15,3,22abc215322yxx(2)1x-5(2)3x161211520102tt123,1tt3t11522520htt25(2)20t2t1.51081713yxA30B039303bcc23bc223yxx2D14xC10.P2(,23)aaa211(423):(44)5:422aa.2235aa223aa02235aa4,2aaP45P25223aa02235aa2220aa452532652baabcc1815.71024026045=602260(100)(457.5)10xyx23315240004yxx324000315432xxy23(210)90754x2104x210)5.71026045(xxW23(160)192004xx160Wx210Wx21017325x200180001732518000W