1、bbb999?!?999?!?XXX0.11.?IO?%(a,b)r?IO(x a)2+(y b)2=r2.2.?x2+y2+Dx+Ey+F=0(D2+E2 4F 0)3.x2+y2+Dx+Ey+F=0?XA:(a)?D2+E2 4F 0L?%(D2,E2),D2+E2 4F2.(b)?D2+E2 4F=0L:(D2,E2).(c)?D2+E2 4F 0=d r.(b)=0=d=r.(c)l 0=d r1+r2;(b)?d=r1+r2;(c)?|r1 r2|d r1+r2;(d)Sd=|r1 r2|;(e)Sd|r1 r2|.6.?K(a)?x2+y2=r2:M(x0,y0)eM:3?KLM:
2、?x0 x+y0y=r2;(b)L?x2+y2+Dx+Ey+F=0?:M(x0,y0):T|MT|=px20+y20+Dx0+Ey0+F.0.2:1.ex2+y2+ax+2ay+a 1=0L?Ka?()A.a 23B.23 a 0C.2 a 0D.2 a 232.ex y=2?(x a)2+y2=4?u22Ka?()A.-13B.13C.-26D.043.L:P(2,3)?(x+1)2+y2=25?uAB:PuAB?:KuAB3?()A.x y 5=0B.x y+5=0C.x+y+5=0D.x+y 5=04.?x2 2x+y2 3=0?%?x+3y 3=0?l.5.5x+12y+m=0?x2
3、2x+y2=0Km=.10.3;K1.?(a)L:A(5,2),B(3,2)?%32x y 3=0?.(b)?%3y=4xl:x+y 1=0uP(3,2)?.2.?u!:uK(a):P(0,5)9?C:x2+y2+4x 12y+24=0.elLP:?C?43l?.(b)l:2mx y 8m 3=0?C:x2+y2 6x+12y+20=0.i.m RylCo?ii.m?l?C?udu3?u.3.?K(a):M(3,1),ax y+4=09?(x 1)2+(y 2)2=4.i.LM:?ii.eax y+4=0?a?iii.eax y+4=0?uA,B:uAB?23a?.2(b):A(1,a)?x2
4、+y2=4.i.eL:A?ka?9ii.eL:A3I?a?9.0.4pK1.(2013)L:(3,1)?(x 1)2+y2=1?:OA,BKAB?()A.2x+y 3=0B.2x y 3=0C.4x y 3=0D.4x+y 3=02.(2013-)?C1:(x 2)2+(y 3)2=1?C2:(x 3)2+(y 4)2=9,M,NO?C1,C2?:Px?:K|PM|+|PN|?()A.52 4B.17 1C.6 22D.173.(2013)?C:x2+y2 4x=0,lLP(3,0):?K()A.lC?B.lC?C.lC?D.nkU4.(2013)L:(2,0)l-y=1 x2?uA,B:OI?:?4OAB?l?u()A.33B.33C.33D.35.(2012)3?IXxOy?C?x2+y2 8x+15=0,ey=kx 2?k:?T:?%1?Ck?:Kk?.36.X3?IXxOy:A(0,3),l:y=2x 4.?C?1?%3l.(a)e?%C3y=x 1L:A?C?(b)e?C3:MMA=2MO,?%C?Ia?.4