Question

3 mũ x + 3 mũ x+ 2 bang 810

Answer 1

\(3^x+3^{x+2}=810\\ 3^x\left(1+3^2\right)=810\\ 3^x.10=810\\ 3^x=810:10\\ 3^x=81\)

\(\Rightarrow x=4\)

Answer 2

3^x+3^x+2=810

=>3^x+3^x+2=3⁴+3⁴⁺²

=>x=4

Answer 3

3mũ x+3mũ x+2=810 3mũ x+3mũ x+3mũ2=810 3mũ x×(1+3mũ2)=810 3mũ x×10=810 3mũ x=810:10 3mũ x=81 Vậy x=4

Answer 4

Vậy x = 4