,&?g+02=2(cosa-sina),p,p2=-3,\rp1-2p(cos0+sin^)-3=0\r\0a\rJxJiLM812c/n.4°£&?p3+P4=2(sina+cosa),p3P!=-3,\r¤p:22(cosO+sina)-3=0\r\O^+|OB|2+|OC|2+|OD|2=g+p)2-2+(+p)2-2=20.\r2PlAA4AAEvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\rAB2+BC2+CD2+DA2=40.\r23.(1)0,ge(2)(-8,-2)u¨e,+8).\rtuvw(1)uxW-2{-2<x<l,x>I«¬®?,¯/(x)<4,gc&?,¯/(x)44\r?°e\r(2)uv&?h±1,2]³?4>/´3µ+24<-/+[-2¶·¸¹º»¼½¾&\r?¿aÀÁÂ.\rtÃ?wkÄa=2Å/(x)=|x+2|+2|x-l|.\rÄxW´2Å/(x)=´Æ:2´2x+2W4,??xW´ÇÅxe0e\rÄ:2<x41Åf(x)=x+2-2x+2<4,??x20,ÇÅ04x41e\rÄx>lÅf(x)=x+2+2x´2V4,??ÊËÅI<x4§.\r4-\rÍÇÄa=2Å,¯/(x)<4?°a,]e\r(2)Ä14x42Å,+4+2,:1|&|Î+a-2X+2,\rx+a>x2-2x+2^x+a<-x2+2x-2,\rXÐÑxw[l,2],³?>f-3¡+2a<-Ô+x-2.\ra>x2#3x+2=^x#´eÍXÕ[12]´´3x+2N´,A\ra<-x2+x-2=-^x-^Íxe[l,2],´/+x´2M-2,a<-2,\rÍÇ¿”ÀÁÂ(-8,-2)U(-g