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Chuyên đề căn bậc hai

Authored by Tuân Nguyên

Mathematics

Professional Development

CCSS covered

Used 74+ times

Chuyên đề căn bậc hai
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15 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

Tags

CCSS.8.EE.A.2

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Số 16 có hai căn bậc hai là:

4

-4

256

±4\pm4

Tags

CCSS.8.EE.A.2

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 
 So saˊnh 5 với 26So\ sánh\ 5\ với\ 2\sqrt{6}   ta có kết luận sau:

 5>265>2\sqrt{6}  

 5<265<2\sqrt{6}  

 5=265=2\sqrt{6}  

Không so sánh được

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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

 x>32x>\frac{3}{2}  

 x<32x<\frac{3}{2}  

 x≥32x\ge\frac{3}{2}  

 x≤32x\le\frac{3}{2}  

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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

 x≥−52x\ge\frac{-5}{2}  

 x<−52x<\frac{-5}{2}  

 x≤−52x\le\frac{-5}{2}  

 x>−52x>\frac{-5}{2}  

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 (x−1)2\sqrt{\left(x-1\right)^2}  bằng

x - 1

1 - x

 ∣x−1∣\left|x-1\right|  

 (x−1)2\left(x-1\right)^2  

Tags

CCSS.8.EE.A.2

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 (2x+1)2\sqrt{\left(2x+1\right)^2}  bằng

-(2x+1)

 ∣2x+1∣\left|2x+1\right|  

2x+1

 ∣−2x+1∣\left|-2x+1\right|  

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