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(1)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 (2 diem) a) True dill thirc m~u cua bieu thirc: b) Giai h~ plnrong trinh: / /5-1 2X - Y = { x; ::: v) { x +Sy =I ~ ,;:-i Can (2 diem) Fa) Fa- h' P (Sa , 0' Ch o bd leu t uc: = r: T"!' VO'l a > va a =1= va-l a-va a a) Rut gon bieu tlnrc P ::: b) V6i gia tri nao cua a thi P = Q-:-OCan (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 + 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 = I1A- z, tk >r\ +' Can (3 diem) Cho tam giac ABC co ba goc nhon, noi ti€p duong tron tam o Hai duong cao AM, BN c~t 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 (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:» • (2)