Question

giúp mk bài này vs !!!!!!!!!

Answer 1

\(1+\dfrac{1}{\sqrt{2}}+\dfrac{1}{\sqrt{3}}+...+\dfrac{1}{\sqrt{n}}>\dfrac{1}{\sqrt{n}}+\dfrac{1}{\sqrt{n}}+...+\dfrac{1}{\sqrt{n}}=n\left(\dfrac{1}{\sqrt{n}}\right)=\sqrt{n}\)