\(2^{300}=8^{100}=64^{50}\)
\(vi64>25\)
\(=>64^{50}>25^{50}\)
\(vay25^{50}< 2^{300}\)
a.Ta có :
\(2^{300}=2^{6.50}=\left(2^6\right)^{50}=64^{50}\)
Vì \(64^{50}>25^{50}\Rightarrow25^{50}< 2^{300}\)
b. Ta có :
\(2^{90}=2^{30.3}=\left(2^{30}\right)^3\)
Vì \(\left(2^{30}\right)^3>5^3\Rightarrow2^{90}>5^3\)