I SO GD&DT BAC NtrI.{H TRIIOI{G TIIPT HAN THUYON (Di c6 0l trang) Ciu 1(1,0 di6m). Khdo siitvdvE ddthihdm sO (f'): y=+f -+ZL Ciu 2 (1,0 tli6m). Cho parabol (P.):y= x'-12m-31x+(m-I)'1 vir dulng thing d:y=7,'-**'' Chimg minh rdng d lu6n cit g^1t4i hai di6m phdn biQt A;B khi m thay d6i. Tim m d6 tam giirc OAB vudng t4i O (vdt O ld g6c tqa dQ). Ciu 3 (1,0 ili6m). I ,4l. Lno slnd =- voi 900 <a <1800. Tinh tancr' 2. BiCt sina + cosa = m. Tinhgid tri bitiu thtic: I = sina-cosu tan'a-l Et KrEM TRA cHAr LtIgNG DAUNAM NAM HQC 2016 - 2017 MON roAN LdP 11 Thdi gian ldm bdi: 180 phtu, kh6ng ke thdi gian phat di sii? a sina+cosa Ciu 4 (1,0 tti6m). Gidi b6t phuong trinh: l' -21' ,r3x'-5x+6 c6u 5 (1,0 tli6m). Gi6i hQ phuong tririh: {<,1"x + l!,zt - n = aw " I(4x + 5)(Y-5) = 41Y CAu 7 (1,0 tli€m). Gi6i phuong trinh: ./2.- Ciu 6 (1,0 tli6m). Cho tam giric ABC co AB = a;BC =2a; g6c BAC =120'.LAy trung di6m M c;lia AC. Tinh d0 ditl AM;BM ,tu il6 nOu nhfln xdt vd hinh dqng ram giitc ABM . Ciu 8 (2,0 tli6m). Trong h€ tqa d0 Oxy cho tam giiic ABC dilth l(-3;4) noi d6p dudng trdn (C) tam 1(1;7) . Phuong trinh dudng phdn gi6c trong g6c A lit d : x + y -1 = 0 . 1. Vi6tphuong trinh (C). Timtqad0 <ti€m D(khric A)lit giaodi6m cua d vd (C). z. Bi6t dG;BC) = a.d(l;BC), vi6t phucrng trinh duong thing ,BC ' Ciu 9 (1,0 tli6m). Cho c6c st5 thpc dtong a;b;c . Tim gi6 tri nh6 nhdt ctra bi€u thric - a+3c c+3a 4by=-+-+- a+b b+c c+a --------- HET ---------- Thi sinh khOng tluqc sr? dgng tiri liQu. Cr{n bQ coi thi khOnb giAi thich gi th6m. Ho vir t€n thi sinh :...........
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