Quiz about เลขยกกำลัง

Question 1

$$31 imes10^5\ มีค่าเท่ากับข้อใด$$

Accepted Answer

$$3.1 imes10^6\ $$

Answer

$$3.1 imes10^4\ $$

Answer

$$3.1 imes10^5\ $$

Answer

$$3.1 imes10^7\ $$

Question 2

$$\left(4x^2\right)^3\left(2x^3\right)^2มีค่าเท่ากับข้อใด$$

Accepted Answer

$$256x^{12}$$

Answer

$$64x^{16}$$

Answer

$$256x^{18}$$

Answer

$$256x^{36}$$

Question 3

$$จงหาค่าของ\left(ab^2\right)^3\left(-2a^2\right)^2$$

Accepted Answer

$$4a^7b^6$$

Answer

$$2a^3b^2$$

Answer

$$2a^2b^6$$

Answer

$$-4a^7b^6$$

Question 4

$$\frac{3^5 imes3^8}{3^{12}}มีค่าเท่ากับข้อใด$$

Accepted Answer

3

Answer

$$3^{\frac{10}{3}}$$

Answer

$$3^{25}$$

Answer

$$\frac{1}{3}$$

Question 5

$$จำนวน\ \ \ \ \frac{\left(-2a^2\right)^3}{\left(2^2a\right)^4}\ มีค่าเท่ากับข้อใด$$

Accepted Answer

-2a2

Answer

$$-\frac{a^2}{2^5}$$

Answer

$$\frac{a^2}{\left(-2\right)^5}$$

Answer

$$\frac{2a^2}{2^5}$$

Question 6

$$ถ้าa e0และ\ n\ เป็นจำนวนเต็ม\ \frac{\left(a^n ight)^2}{a^n}\ มีผลลัพธ์เท่ากับข้อใด$$

Accepted Answer

$$a^n$$

Answer

1

Answer

2

Answer

$$a$$

Question 7

$$\frac{-30a^{10}}{-5a^5}มีค่าเท่ากับเท่าใด$$

Accepted Answer

6a5

Answer

6a2

Answer

-6a2

Answer

-6a5

Question 8

$$\frac{4a^{-5}b^4}{16a^{-3}b^{-1}}มีค่าเท่ากับเท่าใด$$

Accepted Answer

$$\frac{1}{4}a^{-2}b^5\ $$

Answer

$$\frac{1}{4a^{-8}b^{-5}}$$

Answer

$$\frac{1}{4}a^{-8}b^{-5}\ $$

Answer

$$\frac{1}{4}a^2b^5\ $$

Question 9

$$\left(5x^2y^{-3}\right)\left(4x^{-5}y^4\right)มีค่าเท่ากับเท่าใด$$

Accepted Answer

$$\frac{20y}{x^3}$$

Answer

$$\frac{10y}{x^3}$$

Answer

$$\frac{15y}{x^3}$$

Answer

$$\frac{20y}{x^2}$$

Question 10

$$\left(\frac{m^{-2}n}{m^3n^{-4}}\right)^{-3}\div\left(\frac{mn^{-1}}{m^{-3}n^2}\right)^5มีค่าเท่ากับเท่าใด$$

Accepted Answer

$$\frac{1}{n^{12}}$$

Answer

$$\frac{1}{m^5}$$

Answer

$$\frac{1}{m^{-9}}$$

Answer

$$\frac{1}{n^7}$$

Question 11

$$เมื่อx e0,y e0,m,nเป็นจำนวนเต็มบวกข้อความใดต่อไปนี้ข้อใดถูกต้อง$$

Accepted Answer

$$\left(x^m-x^n\right)^{-1}=\frac{1}{x^m-x^n}$$

Answer

$$\frac{x^m}{x^n}=x^{m+n}$$

Answer

$$\left(x^{-m}\right)^{-n}=\frac{1}{x^{mn}}$$

Answer

$$\left(x^my^n\right)=x^{mn}y^{mn}$$

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