Question

So sánh : \(3^{39}\)  và \(11^{21}\)

Answer 1

\(3^{39}< 3^{40}=\left(3^2\right)^{20}=9^{20}< 11^{21}.\)

\(3^{39}< 11^{21}\)

Answer 2

3³⁹<3⁴²=(3⁶)⁷=729⁷

11²¹=(11³)⁷=1331⁷

Vì 729⁷<1331⁷ => 3⁴²<11²¹ => 3³⁹<11²¹