a) Ta có:
\(2^{300}=\left(2^3\right)^{100}=8^{100}\)
\(3^{200}=\left(3^2\right)^{100}=9^{100}\)
Vì \(8^{100}< 9^{100}\) nên \(2^{300}< 3^{200}\)
b) Ta có:
\(2^{161}>2^{160}=\left(2^4\right)^{40}=16^{40}\)
Vì \(16^{40}>13^{40}\) nên \(13^{40}< 2^{161}\)