KIỂM TRA BÀI CŨ

KIỂM TRA BÀI CŨ

9th Grade

10 Qs

quiz-placeholder

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KIỂM TRA BÀI CŨ

KIỂM TRA BÀI CŨ

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Medium

Created by

Mai Nguyễn

Used 19+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính  425\sqrt{\frac{4}{25}}  

 45\sqrt{\frac{4}{5}}  

 25\sqrt{\frac{2}{5}}  

 25\frac{2}{5}  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính 16\sqrt{-16}  

 4-4  

4

Không có

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 (7)2\sqrt{\left(-7\right)^2}  ;  (7)2-\left(\sqrt{7}\right)^2  ;  (7)2-\sqrt{\left(7\right)^2}  

Trong các số sau số nào là căn bậc hai số học của 49:

 (7)2\sqrt{\left(-7\right)^2}  

 (7)2-\left(\sqrt{7}\right)^2  

 (7)2-\sqrt{\left(7\right)^2}  

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

 A\sqrt{A}  được xác định (hay có nghĩa) khi A có giá trị như thế nào?

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

So sánh  2\sqrt{2}  và 1

 2>1\sqrt{2}>1  

 2<1\sqrt{2}<1  

 2=1\sqrt{2}=1  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Rút gọn (315)2\sqrt{\left(3-\sqrt{15}\right)^2}  

 3153-\sqrt{15}  

 55  

 153\sqrt{15}-3  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm x để căn thức 4x+8\sqrt{-4x+8}  được xác định


 x0x\ge0  

 x2x\le2  

 x>2x>2  

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