Question

3^x-2=81 

Answer 1

\(3^{x-2}=81\\ \Rightarrow3^{x-2}=3^4\\ \Rightarrow x-2=4\\ \Rightarrow x=6\)

Vậy x = 6

Answer 2

3^x-2=3⁴

x-2=4

x=4+2

x=6

NẾU SAI CHO MIK XIN LỖI !

Answer 3

Cảm ơn 2 bạn