Question

3^x+4  +  3^x = 2214

Answer 1

giải giúp mik

Answer 2

\(3^{x+4}+3^x=2214\Rightarrow3^x.81+3^x=2214\Rightarrow3^x.\left(81+1\right)=2214\Rightarrow3^x.82=2214\Rightarrow3^x=27=3^3\Rightarrow x=3\)

Answer 3

\(3^{x+4}+3^x=2214\Leftrightarrow3^x\left(3^4+1\right)=2214\)

\(\Leftrightarrow3^x=27\Leftrightarrow x=3\)

Answer 4

3^{x + 4} + 3^x = 2214

⇔ 3^x . 3⁴ + 3^x = 2214

⇔ 3^x(3⁴ + 1) = 2214

⇔ 3^x . 82 = 2214

⇔ 3^x = 27

⇔ x = 3

Answer 5

\(3^{x+4}+3^x=2214\)

\(\Leftrightarrow3^x\cdot82=2214\)

\(\Leftrightarrow3^x=27\)

hay x=3