Question

5^3x : 5^x = 5²

Answer 1

\(\rightarrow5^{3x-x}=5^2\\ \rightarrow3x-x=2\\ \rightarrow2x=2\\ \rightarrow x=1\)

 

 

Answer 2

125x/5x=5^2

125x/5x=25

xong nhớ nai

Answer 3

`5^(3x) : 5^x = 5^2`

`<=>5^(3x -x ) =5^2`

`<=> 5^(2x)=5^2`

`=> 2x =2`

`=> x =2/2 =1`

Vậy `x=1`