Question

[Vân Nguyễn Hồng]

Cac ban hay anh/chi giup minh voi. Minh can gap a. Mong moi nguoi trinh bay day du, ro rang. Minh (em) se tik cho mn da tra loi giup a. Minh (em) cam on nhieu !

De bai: So sanh hai phan so sau: \(\frac{2013.2012-1}{2013.2012}\)va  \(\frac{2012.2011-1}{2012.2011}\)

Answer 1

[Thiên Thần Hye Kyo]

Ta có:

+) \(\frac{2013.2012-1}{2013.2012}=1-\frac{1}{2013.2012}\)

+) \(\frac{2012.2011-1}{2012.2011}=1-\frac{1}{2012.2011}\)

Vì \(\frac{1}{2013.2012}< \frac{1}{2012.2011}\Rightarrow1-\frac{1}{2013.2012}>1-\frac{1}{2012.2011}\)

Vậy \(\frac{2013.2012-1}{2013.2012}>\frac{2012.2011-1}{2012.2011}\)