Question

So sánh 99²⁰ và 9999¹⁰

Answer 1

Ta có:99²⁰=(99²)¹⁰=9801¹⁰

Vì 9801¹⁰<9999¹⁰ 

nên 99²⁰<9999¹⁰

Answer 2

\(99^{20}=\left(99^2\right)^{10}=9801^{10}=>9801^{10}< 9999^{10}\)

Vậy 99²⁰ < 9999¹⁰

Answer 3

\(9999^{10}=\left(99.101\right)^{10}=99^{10}.101^{10}>99^{10}.99^{10}=99^{20}\)

Vậy \(99^{20}< 9999^{10}\)