Question

3^x+2- 3x = 24. tìm x

Answer 1

3^{x+2 -} 3x = 24

3^x ( 3² - 1 ) = 24

3^x .8 = 24

3^x = 24 : 8

3^x =3

\(\Rightarrow\) x = 1

Vậy x = 1

~~~Hok tốt~~~

Answer 2

\(3^{x+2}-3^x=24\)

\(\Leftrightarrow3^x\left(3^2-1\right)=24\)

\(\Leftrightarrow3^x.8=24\)

\(\Leftrightarrow3^x=3^1\)

\(\Leftrightarrow x=1\)

Vậy : \(x=1\)