Question

3^x=81

Answer 1

=>3^x=3^4

=>x=4

Answer 2

\(3^x=81\)

\(\Rightarrow3^x=3^4\)

\(\Rightarrow x=4\)

Vậy \(x=4\)

Answer 3

\(3^x=84\\ \Rightarrow3^x=3^4\\\Rightarrow x=4\)

Vậy \(x=4\)

Answer 4

=>3^x=3^4

=>x=4