Bài 1

Bài 1

9th Grade

12 Qs

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Bài 1

Bài 1

Assessment

Quiz

Education, Other

9th Grade

Hard

Created by

Ngân Phạm Thị

Used 5+ times

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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Căn bậc hai số học của 9 là:

-3

3

±3\pm3

81

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Số 16 có hai căn bậc hai là:

4

-4

256

±4\pm4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 2x+5\sqrt{2x+5}  xác định khi và chỉ khi

 x52x\ge\frac{-5}{2}  

 x<52x<\frac{-5}{2}  

 x52x\le\frac{-5}{2}  

 x>52x>\frac{-5}{2}  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 32x\sqrt{3-2x}  xác định khi và chỉ khi

 x>32x>\frac{3}{2}  

 x<32x<\frac{3}{2}  

 x32x\ge\frac{3}{2}  

 x32x\le\frac{3}{2}  

5.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Điền vào chỗ trống để được đẳng thức đúng: a2b=ab\sqrt{a^2b}=a\sqrt{b}  khi ...


6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Giá trị của biểu thức (73)2\sqrt{\left(\sqrt{7}-3\right)^2} bằng:

 73\sqrt{7}-3  

 373-\sqrt{7}  

2

4

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (x1)2\sqrt{\left(x-1\right)^2}  bằng

x - 1

1 - x

 x1\left|x-1\right|  

 (x1)2\left(x-1\right)^2  

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