Bài kiểm tra Vật lý 7

Trường THCS Chiềng Cơi
Họ và tên: ……………………………………………………………….
Lớp: ………….
Ngày 23 tháng 10 năm 2010
BÀI KIỂM TRA 45 PHÚT
Môn: Toán 9


Điểm
Lời phê của giáo viên







ĐỀ BÀI

I. TRẮC NGHIỆM (2 điểm)
* Điền nội dung thích hợp vào chỗ (…) để được câu đúng.
Câu 1: Muốn khai phương một tích của các số không âm, ……………………………………...…….……………………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………………
Câu 2: Muốn chia hai căn thức bậc hai ……………………………………...……………………………………….
……………………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………………
* Khoanh tròn vào chữ cái đứng trước kết quả đúng.
Câu 3: Căn bậc hai của 2 là:
A.
. B.
. C.
. D.
. E.
và
.
Câu 4: Căn bậc hai của
là:
A.
B.
C.
và
D. 2 E.
.
II. TỰ LUẬN (8 điểm).
Câu 1 (2 điểm): So sánh: a.
và
; b. 2 và
.
Câu 2 (2,5 điểm): Rút gọn biểu thức:
a.
b.
.
Câu 3 (1 điểm): Trục căn thức ở mẫu:

Câu 4 (2,5 điểm): Cho biểu thức
(Với a>0; b>0).
Rút gọn P.
- Tính giá trị của P với a = 16.
BÀI LÀM PHẦN TỰ LUẬN
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