𝑇𝑎 𝑐𝑜́:
$2^{𝑚}$ + $2^{𝑛}$ = $2^{𝑚+𝑛}$
$2^{𝑚}$ + $2^{𝑛}$ = $2^{𝑚}$ . $2^{𝑛}$
$2^{𝑚}$ . $2^{𝑛}$ - $2^{𝑚}$ - $2^{𝑛}$ = 0
$2^{𝑚}$ . ($2^{𝑛}$ - 1) – ($2^{𝑛}$ - 1) = 0 + 1
($2^{𝑚}$ - 1) . ($2^{𝑛}$ - 1) = 1 . 1
$2^{𝑚}$ - 1 = 1
$2^{𝑚}$ = 2 ⇒ 𝑚 = 1
$2^{𝑛}$ - 1 = 1 ⇒ $2^{𝑛}$ = 2 ⇒ 𝑛 = 1
𝑉𝑎̣̂𝑦 𝑚 = 1; 𝑛 = 1
Chúc bạn học tốt :)