DE THI TUYEN SINH 2012 HA TINH

<span class='text_page_counter'>(1)</span>sa GIAo DVC y A DAo T~O. KY THI TUYEN SINH LOP 10 THPT NA.M H<}C 201~ - 2013 MONTOAN Thili gian tam bdi: 120 phut. HA TINH. DE CHiNH (DJ thi. THUC. co 01 trang). fua d~021 Can 1 (2 diem) a) True dill thirc 6 m~u cua bieu thirc:. b) Giai h~ plnrong trinh:. .. /. 4. /5-1. 2X - Y = 9 { x; ::: 4 . v) { x +Sy =I ~ ,;:-i. Can 2 (2 diem). Fa) Fa-. 1 h' P (Sa ,. 0' Ch o bd. leu t uc: = r: T"!' 2 VO'l a > va a =1= 1. va-l a-va a a) Rut gon bieu tlnrc P. ::: 4 b) V6i gia tri nao cua a thi P = 4. Q-:-OCan 3 (2 diem) a) Trong m~t phang toa dQ Oxy, duong thang y = ax + b di qua diem M (-2; 1) va song song voi duong thAng y = 2x + 1. Tim a va b. Q c, J.. b ~ c;b) GQi x, va x21a hai nghiem cua phirong trinh: X2- 4x - m2 5m = O. Tim cac gia tri cua m san cho IXI- x21 = 4. I1A- z, tk >r\. +'. Can 4 (3 diem) Cho tam giac ABC co ba goc nhon, noi ti€p duong tron tam o. Hai duong cao AM, BN c~t nhau tai H (M EBC, N E AC). a) Chirng minh ill giac ABMN nQi ti€p duong tron, b) Tia AO c~t duong tron'(O) tai K (K khac A). Chung minh ill giac BHCK la hinh binh hanh, c) GQi P la giao diem cua tia CH voi AB. Tim gia tri nho nhat cua bieu thirc: Q=AM+ BN + CP . HM HN HP Can 5 (1 diem) Ti~ tAt ca cac gia tri cua tham s6 m de phuong trinh sau x -2x-2mlx-11-m+3 = O.. vo nghi~m:bP. rV. .. ~. 0'. (\, N. --------------------. H€t. ---------------------. - Thi sinh khong duoc sir dung tai lieu. - Giam thi khong giai thich gi them. 'A. ,.. H9 va ten thi sinh:. I.. .". '>---. .••.•••••••. I.,. ,.'. '". SO bao danh:». •. ..

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