Question

So sánh: \(\dfrac{41}{91}\) và \(\dfrac{411}{911}\)  ;  \(\dfrac{33}{131}\) và \(\dfrac{53}{217}\)

Answer 1

a: 41/91=1-50/91=1-500/910

411/911=1-500/911

mà -500/910<-500/911

nên 41/91<411/911

b: 33/131>33/132=1/4=53/212>53/217