KIEM TRA DS CHUONG 3 DUNG DUOC

<span class='text_page_counter'>(1)</span>Họ và tên: …………………………………………… Lớp 9/2. KIỂM TRA MỘT TIẾT CHƯƠNG IV Điểm MÔN: ĐẠI SỐ 9 Ngày kiểm tra: 09.04.2012. Bài 1. Giải các phương trình sau a. x2 + 6x + 8 = 0 b. c) x2 + 3x - 10 = 0 c. 4x2 – 9 = 0 Bài 2. Cho hàm số y = -x2 (P) và hàm số y = 2x – 3 (d) a. Vẽ đồ thị hai hàm số trên cùng mặt phẳng tọa độ OXY b. Xác định tọa độ giao điểm của (P)và (d) Bài 3. Cho phương trình x2 + 6x – 7 = 0. Không giải phương trình hãy tính tổng 2 nghiệm x1+ x2 và tích 2 nghiệm x1.x2 Bài 4. Cho phương trình x2 - 2mx + 2m - 1 = 0 a. Chứng tỏ phương trình luôn có nghiệm x1 , x2 với mọi m. b. Tìm m để 2 nghiệm x1 , x2 của phương trình thỏa mãn hệ thức x12 + x22 = 5 BÀI LÀM ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ .............................................................................................................................................................................................................................................................................................

<span class='text_page_counter'>(2)</span> ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ ............................................................................................................................................................................................................................................................................................ .............................................................................................................................................................................................................................................................................................

<span class='text_page_counter'>(3)</span> MA TRẬN ĐỀ KIỂM TRA CHƯƠNG IV MÔN : ĐẠI SỐ HỌC LỚP 9 Cấp độ Chủ đề Chủ đề 1: Tính chất và đồ thị hàm số y=ax2. Nhận biêt TNKQ. TL. Thông hiểu TNKQ. TL. (a ≠ 0). Số câu hỏi Số điểm Tỉ lệ % Chủ đề 2: Công thức nghiệm tổng quát và công thức nghiệm thu gọn Số câu hỏi Số điểm Tỉ lệ % Chủ đề 3: Hệ thức Vi-et và ứng dụng. Số câu hỏi Số điểm Tỉ lệ % Tổng số câu Tổng số điểm Tỉ lệ %. Vận dung Cấp độ Thấp Cấp độ Cao TNKQ TL TNKQ TL Biết vẽ đồ thị hàm số và tìm tọa độ giao điểm 2 3 30% Biết giải các Biết giải phương dạng PT bậc trình chứa tham số hai m khi biết giá trị của m. Cm pt có nghiệm với mọi m 3. 1. 1 1,5 15% 1. 5 1,5. 15%. 60%. 2 3 30%. 4. 4,5 1,5 45% 15% Biết giải phương trình chứa tham số m khi biết giá trị của m. Tìm m để 2 nghiêm của pt thỏa mãn hệ thức T cho trước 2 1 2,5 1 25% 10% 2 8 6 2,5 10 ,25% 100%. 3 30% Biết tìm nghiệm của PT bậc hai. Cộng. HƯỚNG DẪN CHẤM Bài 1: Giải đúng mỗi câu 1 điểm a. x2 + 6x + 8 = 0 b. c) x2 + 3x - 10 = 0 c. 4x2 – 9 = 0 a. x1= -2, x2 = -4 x1= 2, x2 = -5 x1= -3/2, x2 = 3/2 Bài 2. a.Vẽ đúng đồ thi mỗi hàm số 1 điểm b. Phương trình hoành độ : - x2 -2x +3 = 0 X1 = 1. Suy ra y1= -1 x2 = -3. Suy ra y1= -9 (1 điểm) Bài 3. x2 + 6x – 7 = 0.∆ =36 + 28 =64 >0 (0,5 điểm) x1+ x2 = - 6, x1. x2 = -7 (1 điểm) Bài 4.a. ∆’ = (m2 – 2m + 1), ∆’ = (m-1)2≥0 với mọi m. Vậy pt có nghiệm với mọi m (1,5điểm) b. Tính được m=3/2 và m = -1/2( 1 điểm).

<span class='text_page_counter'>(4)</span>