phong GD DT quang trach de khao sat chat luong hoc ki 2 phong GD DT quang trach de khao sat chat luong hoc ki 2 nam hoc 2012 2013 mon toan 8 thoi gian 90 phut (khong ke thoi gian giao de) ma de 02 cau[.]
phong GD-DT quang trach luong hoc ki giao de) de khao sat chat nam hoc 2012-2013 mon:toan thoi gian: 90 phut (khong ke thoi gian ma de 02 cau (2.0 diem):giai cac phuong trinh sau: a) 3x-1=0 b) 1/x+2 - 2/x-1 = 4x-8/(x+2)(x-1) cau (1.0 diem) giai cac bat phuong trinh sau va bieu dien tap nghiem tren truc so 2x-3 >= cau 3.(2.0 diem): luc gio , mot xe may A de den B sau 1gio,mot oto khoi hanh tu Ade den A van toc trung binh lon hon van toc trung binh cua xe may la 20 km/h ca hai xe den B luc 10 gio 30 phut cung tinh dai quang duong AB va van toc trung binh cua xe may cau (3.0 diem) cho tam giac DEF vuong tai d, co DE=3 cm, DF=4cm, duong cao DP, phan giac goc DEF cat DP tai M va cat DF tai M va cat DF tai N a)C/M : tam giac PED dong dang voi tam giac DEF b) tinh dai cac doan thang EF,PD c) C/M : cau 5.(1.0 diem)tinh dien tich xung quanh cua hinh lang tru dung MNP.M'N'P' co day la tam giac deu canh cm , canh ben MM' = 5cm cau 6.(1.0 diem) tim x thao man bat dang thuc 2x-1/2-x>1