LUYỆN TẬP

LUYỆN TẬP

9th Grade

20 Qs

quiz-placeholder

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LUYỆN TẬP

LUYỆN TẬP

Assessment

Quiz

Mathematics

9th Grade

Hard

Created by

Hoàng An

Used 5+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Giá trị của biểu thức  \sqrt{\left(2+\sqrt{7}\right)^2}  

 2+72+\sqrt{7}  

 272-\sqrt{7}  

 72\sqrt{7}-2  

 27-2-\sqrt{7}  

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Giá trị của biểu thức  \sqrt{12,5}.\sqrt{2}  là 

6,25

5

-25

25

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rút gọn biểu thức  ab^2\sqrt{\frac{3}{a^2b^4}}\ \ \ \left(a<0,\ b\ne0\right)  

 3ab2-\sqrt{\frac{3}{ab^2}}  

 3ab2\sqrt{\frac{3}{ab^2}}  

 3-\sqrt{3}  

 3\sqrt{3}  

4.

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Cho tam giác ABC vuông tại C, sinA bằng

ABAC\frac{AB}{AC}

ABBC\frac{AB}{BC}

BCAC\frac{BC}{AC}

BCAB\frac{BC}{AB}

5.

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Trong tam giác ABC vuông tại A, cosB bằng

ABBC\frac{AB}{BC}

ABAC\frac{AB}{AC}

ACBC\frac{AC}{BC}

BCAB\frac{BC}{AB}

6.

MULTIPLE CHOICE QUESTION

5 sec • 1 pt

Trong tam giác ABC vuông tại C, cotB bằng

ABBC\frac{AB}{BC}

 ACAB\frac{AC}{AB} 

ACBC\frac{AC}{BC}

BCAB\frac{BC}{AB}

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm x biết  \sqrt{25x}-\sqrt{16x}=9  

x=1

x=3

x=9

x=81

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