... TNH s 5 THI TH I HC V CAO NG NM 2010 Mụn thi: TON Thi gian: 180 phỳt (khụng k thi gian phỏt ) I. PHN CHUNG (7 im) Cõu I (2 im): Cho hm s yxmxmx322(3)4=++++ (Cm). 1) Kho sỏt s bin thi n v ... P l trung im ca CD ị NP ^ (ABCD). MCNaS264D= , MCPaS24D= ị MCPMCNSS6cos6DDj==. Cõu V: ã T gi thit ị xyzyzxzxy1++= v xyzxyzxyyzzx222=++++ ị xyz1111++Ê. ã Chỳ ý: Vi a, b > 0, ta cú: abab411Ê++ ... Giao im A(2; 3). Gi s d: axbyab22(2)(3)0(0)-+-=+ạ. Gi ddOdddId122(,),(,)==. Trn S Tựng T gi thit, ta suy ra c: RdRd22221122-=- dd222112-= aabababab222222(623)(23)12-----=++ bab230+=...