Question

[nguyen huu hai dang]

\(A=\frac{2012+\frac{2011}{2}+\frac{2010}{3}+\frac{2009}{4}+...+\frac{1}{2012}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2012}+\frac{1}{2013}}\)

hỏi A có chia hết cho 3 hay ko ?

Answer 1

[Đỗ Thị Thảo Hiền]

http://d.f24.photo.zdn.vn/upload/original/2016/02/14/10/03/3204324726_616688374_574_574.jpg

Answer 2

[Andrea]

có chia hết