\(7^n=49=7^2=\left(-7\right)^2=>\hept{\begin{cases}n=7\\n=-7\end{cases}}\) ,mà n \(\in\) N nên n=7
\(2^n=32=2^5=>n=5\)
7n = 49
=> 72 = 49
=> n = 2
2n = 32
=> 25 = 32
=> n = 5
\(7^n=49\Rightarrow7^n=7^2\Rightarrow n=2\)
\(2^n=32\Rightarrow2^n=2^5\Rightarrow n=5\)
7n = 49 2n = 32
7n = 72 2n = 25
=> n = 2 => n = 5
