Kiểm tra 45 phút môn Đại số 9 - Đề 1

Họ và tên: KIỂM TRA 45’ Đề 1 Lớp: 9/1 Môn: Đại số 9

Điểm: Lời phê của Thầy , Cô:

Bài 1: (2đ) Tìm x để mỗi căn thức sau có nghĩa:

a) b) 1  x 7 2

1   x Bài 2: (4,5đ) Rút gọn biểu thức sau: a) 72 18 3 45 20   

b)

b a âb

a b b a



 1 :

c)   3 4 7 3 2

2   

Bài 3: (1,5đ) Tìm x biết: 10 16 16 4 3 1 3 25 25       x x x

Bài 4: (2đ) Cho biểu thức:

A = với và   

   



 

  

  



   

 x x

x

x x

x

x

x

1

1

1 1

1 2 3

3 0  x 1  x

a) Rút gọn A. b) Tìm x để A < 2

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