\(A=\dfrac{1}{101}+\dfrac{1}{102}+...+\dfrac{1}{150}+\dfrac{1}{151}+...+\dfrac{1}{200}\)
\(A>\dfrac{1}{150}+\dfrac{1}{150}+...+\dfrac{1}{150}+\dfrac{1}{200}+...+\dfrac{1}{200}\)
\(A>50.\dfrac{1}{150}+50.\dfrac{1}{200}=\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{7}{12}\) (đpcm)





giúp mình câu b bài 1 đc ko ạ

