... x ) ( x y )( 1 ) 25 xy Bi (3 ,0 im) Chohaingtrũn(O 1), (O2)ctnhautiA,B. 1)MtimMtrờn(O 1), quaMktiptuynMDvingtrũn(O 2) MD (Dltipim).Chngminhrngbiuthc MA.MB khụngphthucvovtrớcaM trờn(O 1). 2)KộodiABvphớaBlyimC,tCkhaitiptuynCEvCFvingtrũn ... Cõu 1(2 ): TớnhgiỏtrcaP= a a 16 a a 16 via= 4(1 20 09 ) 4(1 20 09 ) ;a= 20 09 1 20 09 Cõu 2(3 ): a)Giiphngtrỡnh 2x - 2x =1 b)Tỡmttccỏccpsnguyờn(x;y)thomónx22xy+3y5x+7=0. Cõu 3(2 , 5): a) Cho ... 20143 2)Tớnhgiỏtrbiuthc: M (x y) 3(x y)(xy 1) 199 5 ,bit: 3 3 x 2 2 , y Cõu (2 im) 1)Giiphngtrỡnh: x 6x 3x (x z) y y 2)Giihphngtrỡnh: 2 y x y Cõu (2 im) 1)Vimisnguyờndngk,kớhiuk!=1.2.3...