2021¹⁰⁰ + 2021⁹⁹
= 2021⁹⁹.(2021 + 1)
= 2021⁹⁹.2022
2022¹⁰⁰ = 2022⁹⁹.2022
Do 2021 < 2022
⇒2021⁹⁹ < 2022⁹⁹
⇒2021⁹⁹.2022 < 2022⁹⁹.2022
Vậy 2021¹⁰⁰ + 2021⁹⁹ < 2022¹⁰⁰
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