... mxmxxmx222(21)(*)1(1)1(**)(1) -- =ù - - = - T (**) ta cú mx22(1)(1 )-= - xmxm2ộ=ờ =- ã Vi x = m, thay vo (*) ta c: m00= (tho vi mi m). Vỡ x ạ 1 nờn m ạ 1. ã Vi x = 2 m, thay vo (*) ta c: mmmmm2(21)(2)(2)(21 )-- - =-- - ... QUANG MINH s 9 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...
... 1 THI TH I HC V CAO NG NM 2010 Mụn thi: TON Khi ABDV Thi gian: 180 phỳt (khụng k thi gian phỏt ) I. PHN CHUNG (7 im) Cõu I (2 im): Cho hm s yxmmxm4222(1)1 =-- + +- (1) 1) Kho sỏt s bin thi n ... PPddananaaa11,4(1;1;1)ỡ^ộựị= =-- ớởỷ^ợVVVrrrrrrr ị (D): xtytzt376ỡ=+ù=+ớù =- . Cõu VII.a: aizziaiai222121421ộ =-+ =-= - =-+ ở. 2. Theo chng trỡnh nõng cao Cõu VI.b: 1) (C...
... xtytzt12242ỡ=+ù =-- ớù=+ợ To giao im H ca IJ v (a) tho ( )xttytxHztyxyzz121211;1;242122302ỡỡ=+ =- ùùù =-- =- -- ớớ=+ =- -+ -= =ùùợợ
Trn S Tựng Vỡ H l trung im ca IJ nờn ( )J 3;0; 0- . Mt cu (SÂ) ... )xIxxdxJx8833121.ln26ln84ln32+ị= +-= -- ã Tớnh xJdxx831+=ũ. t tttxJtdtdtdttttt333222222111.2221111ổử=+ị=== +- -+ -- ứũũũ ttt8312ln2ln3ln21ổ -= += +- ữ+ốứ
Trn S Tựng...
... hoc 1 4- . H s gúc ca d ti M l: yxx0201()0(1)Â =-& lt ;- ị yx01()4Â =- x20114(1 )-= -- xyxy0000312532ộổử =-= ỗữờốứờổửờ==ỗữờốứở Vy cú hai tip tuyn tho món l: yx13(1)42 =-+ + hoc yx15(3)42 =-- + Cõu ... HSP H NI s 18 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 xyx21 1-= -. 1) K...
... H NI s 19 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 yxmx42221=++ (1). 1) Kho sỏt s bin thi n v v th ... xx2240(2)1ỡ -& gt;ớ+ùợxx23ộ>ờ - (**) PT ( )xxx2222333log43log(2) log(2)4+ +-= xx2233log(2)3log(2)40++ +-= ( )( )xx2233log(2)4log(2)10++ +-= x23log(2)1+= x2(2)3+= x 23 =- Kim tr...