Question

So sánh: 2017^9 + 2017^10  với  2018^10

Answer 1

2017⁹ + 2017¹⁰ = 2017⁹(1 + 2017) = 2017⁹ . 2018

2018¹⁰ = 2018⁹ . 2018

\(\Rightarrow\) 2017⁹ + 2017¹⁰ < 2018¹⁰

Answer 2

\(2017^9+2017^{10}\)

=2017^9(1+2017)=2017^9.2018

=>2018^10=2018^10.2018

=>2017^9+2017^10<2018^10