Question

Tìm số nguyên x , biết:

\(9^x :3^x =3.\)

Answer 1

`9^x : 3^x = 3`

`=> (9 : 3)^x = 3`

`=> 3^x = 3`

`=> 3^x = 3^1`

`=> x=1`

Vậy: `x=1`

Answer 2

\(9^x : 3^x =3\)

\(\Rightarrow (9:3)^x = 3\)

\(\Rightarrow 3^x =3\)

\(\Rightarrow x=1\)