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2021高考数学《椭圆综合》

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.\r22\r17.=>?@ A+0=l(a>b>0)FGM(-2,1),IJKL(8,0).\r(I)O?@P5QR89\r(S)GN(l,0)5ABU?@PVA,BWXt=MA-Z[t5\]^_\r\`^abctiGOL5^.\r(a2b2=3,\rfghi (I)jkl>,mno_1qa?=6,t=3,\r-L\ru?@r5QR89cw+x=1.\r63\r(II)yA3{|}~A8589cy=k(x-lyA(x1,y11B(x2,y21\r6+3-L/+2k2(%_1)2=6,?(1+2k2)x2-4k2%+2k2-6=\ry=k(x-1),\r0,\rc(1,0)?@‚ƒ,„>0,\r_2k2-6\r†*1+%2-1+2H'\r‡t=W"Z=(%1+2)(*2+2)+(yi-1)(ˆ-1)\r=xrx2+2(%i+‰)+4+(kxi-kl)(k%i?fc-1)\r(1+%2+(2?k?-k)PQ+%2)+k?+2k+5\r=(1+/c2)Œ+(2-/c2-/c)-+k2+2k+5,\r'J2k2+1')2k2+i\r_15k2+2J\r-2k2+1'\r†(15?+2/c-1?t=0.kER,\r‡^=22+4(15-2t)(l+0>0,\r(2t-15)(t+1)-1<0,?2t2-13t-16<0,\rtl12:2t2-13t-16=05W,ti+12=5\r12y2\r‘+’=1'=±•\r{X=1,2\r–—-˜)\r=(3,™-1),MB=(3,-™-1),\r›14œ15œEvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\rAM-MB=9--+1=-,\r42\rl>tlVŸVt2\r…¡¢+t2=y.

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