... SGIODCVOTOPHYấN TRNGTHPTCHUYấNLNGVNCHNH THITHIHCLN1NMHC2012ư2013 Mụnthi:TON,KHIA,A 1 ,B,D (Thigianlmbi180phỳt,khụngkthigian phỏt ) PHNCHUNGCHOTTCTHSINH(7im) Cõu 1(2 im). Chohms 3 2 3y x mx m = - + ( ) 1 1.Khosỏtsbinthiờn ... m ạ 0 0,25 ịthcú2imcctr:M(0m)vN(2mm 4m 3 ) ( ) ( ) 3 , 1 3 2 1 4 3 AM AN m m m m = = - + - - uuuur uuur YCBT AM uuuur v AN uuur cựngphng ( ) ( )( ) 3 1 0 3 2 1 4 3 m m m m ì - = - + - - 0,25 ... 2 2 2 1 1 1 4 1 1 AH AI AM AB R IM R = + Û = + - (1) 0,25 6 + ( ) , 3 2d I d R = > :(d)khụngct(C)nờnMnmngoi(C) IM R ị > Doú,t(1)tacú:diABtGTNN IMngnnht MlhỡnhchiucaItrờn(d) 0,25 +ngthng...