Question

8^x / 2^x = 4

Answer 1

8^x/2^x=4

(2³)^x/2^x=2²

2^3x-x=2²

=>3x-x=2

2x=2

x=2÷2

x=1

Answer 2

Chú thích :

a^b=a^b

Answer 3

\(\dfrac{8^x}{2^x}=4\Rightarrow\left(8:2\right)^x=4\Rightarrow4^x=4\Rightarrow x=1\)

Answer 4

\(\dfrac{8^x}{2^x}=4\\ \Rightarrow\left(\dfrac{8}{2}\right)^x=4\\ \Rightarrow4^x=4\\ \Rightarrow4^x=4^1\\ \Rightarrow x=1\)