Question

So sánh 81¹⁶ và 27²⁰

Answer 1

Ta có \(81^{16}=\left(3^4\right)^{16}=3^{64 }\)
          \(27^{20}=\left(3^3\right)^{20}=3^{60}\)
\(\text{Vì }64>60\Rightarrow3^{64}>3^{60 }\)
                   \(\text{hay }81^{16}>27^{20}\)

Answer 2

\(81^{16}=\left(3^4\right)^{16}=3^{64}\)

\(27^{20}=\left(3^3\right)^{20}=3^{60}\)

Vì\(3^{64}>3^{60}\)

Nên\(81^{16}>27^{20}\)