Question

so sánh : 9²⁰ và 27¹³

Answer 1

Ta có:9²⁰=(3²)²⁰=3⁴⁰

27¹³=(3³)¹³=3³⁹

Vì 3⁴⁰>3³⁹ nên 9²⁰>27¹³

Answer 2

9^20=(3^2)^20=3^40(1)

27^13=(3^3)^13=3^39(2)

Vì 40>39=>3^40>3^39

=>9^20>27^13

Answer 3

9^{20 <} 27¹³

Answer 4

9^{20 <} 27¹³

Answer 5

Ta có : \(9^{20}=\left(3^2\right)^{20}=3^{40}\)

           \(27^{13}=\left(3^3\right)^{13}=3^{39}\)

Vì \(3^{40}>3^{39}\)

\(\Rightarrow9^{20}>27^{13}\)