Question

tim x biet:3^2x=81

Answer 1

3^2x=81

3^2x=3⁴

3^2x=3^2.2

^=>x=2

k mik nha

Answer 2

\(3^{2x}=81\Rightarrow2^{2x}=3^4\)

\(\Rightarrow2x=4\Leftrightarrow x=4:2\)

\(x=2\)

Vậy \(x=2\)

Answer 3

\(3^{2x}=81\)

\(\Rightarrow\)\(3^{2x}=3^4\)

\(\Rightarrow\)\(2x=4\)

\(\Rightarrow\)\(x=2\)

Answer 4

3^2x=81

3^2x=3^4

3^2x=3^2.2

=>x=2

Answer 5

(3²)^x=81

9^x = 9²=>x=2