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Toan 7: Luy thua so huu ti - Hai goc doi dinh

Authored by Cai Long

Mathematics

7th Grade

Used 42+ times

Toan 7: Luy thua so huu ti - Hai goc doi dinh
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20 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (12)3=\left(-\frac{1}{2}\right)^3=  

1/8

-3/6

-3/2

-1/8

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (13)2+(25)3.125(9515)0=\left(-\frac{1}{3}\right)^2+\left(-\frac{2}{5}\right)^3.125-\left(-\frac{95}{15}\right)^0=  

-9/80

-80/9

-1/8

-8/9

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 x:(13)2=13x:\left(\frac{1}{3}\right)^2=-\frac{1}{3}  
Khi đó x=

1/9

-1/27

-1/9

1/27

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Chọn câu trả lời đúng

(0,5)7=0,57\left(-0,5\right)^7=-0,5^7

(0,5)7=(0,5)7\left(-0,5\right)^7=-\left(-0,5\right)^7

(0,5)7=0,57-\left(-0,5\right)^7=-0,5^7

(0,5)8=0,58\left(-0,5\right)^8=-0,5^8

5.

FILL IN THE BLANKS QUESTION

2 mins • 1 pt

 27n.9n=927:8127^n.9^n=9^{27}:81  
Khi đó n=
(Viết kết quả dưới dạng số tự nhiên)

(a)  

6.

FILL IN THE BLANKS QUESTION

2 mins • 1 pt

 (13)n=81\left(\frac{1}{3}\right)^n=81  
Khi đó số đối của n bằng:
Viết kết quả dưới dạng số nguyên

(a)  

7.

FILL IN THE BLANKS QUESTION

3 mins • 1 pt

Biết 12+22+32+...+122=6501^2+2^2+3^2+...+12^2=650  
Tính:  22+42+62+...+242=2^2+4^2+6^2+...+24^2=  



(a)  

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