2 câu trả lời
Ta có:
`3^4000=(3^4)^1000=81^1000`
`4^3000=(4^3)^1000=64^1000`
Vì `81^1000 > 64^1000`:
`⇒ 3^4000 > 4^3000`
\(\begin{array}{l} {3^{4000}} = {3^{4.1000}} = {\left( {{3^4}} \right)^{1000}} = {81^{1000}}\\ {4^{3000}} = {4^{3.1000}} = {\left( {{4^3}} \right)^{1000}} = {64^{1000}}\\ Ma\,\,{81^{1000}} > {64^{1000}}\\ \Rightarrow {3^{4000}} > {4^{3000}} \end{array}\)
