Question

Không quy đồng, hãy so sánh:

a, \(\frac{8.7}{5.11}\)và  \(\frac{2.41}{^{3^4}}\)

Answer 1

Ta có như sau: 

a, \(\frac{8.7}{5.11}\)  = \(\frac{56}{55}\); \(\frac{2.41}{3^{4^{ }}}\)= \(\frac{82}{81}\) 

Suy ra \(\frac{56}{55}\)= 1+\(\frac{1}{55}\); \(\frac{82}{81}\)= 1+\(\frac{1}{81}\)

Vì  \(\frac{1}{55}\)> \(\frac{1}{81}\)suy ra \(\frac{56}{55}\)< \(\frac{82}{81}\)

Answer 2

a) Ta có  \(\frac{8.7}{5.11}=\frac{56}{55}=1+\frac{1}{55}\)

\(\frac{2.41}{3^4}=\frac{82}{81}=1+\frac{1}{81}\)

Vì \(\frac{1}{55}>\frac{1}{81}\)nên \(1+\frac{1}{55}>1+\frac{1}{81}\)nên \(\frac{8.7}{5.11}>\frac{2.41}{3^4}\)

Vậy \(\frac{8.7}{5.11}>\frac{41.2}{3^4}\)

Answer 3

Ta có:

a)\(\frac{8.7}{5.11}\)và \(\frac{2.41}{3^4}\)

\(\frac{8.7}{5.11}=\frac{56}{55}=1+\frac{1}{55}\)

\(\frac{2.41}{3^4}=\frac{82}{81}=1+\frac{1}{81}\)

Vì:\(\frac{1}{55}>\frac{1}{88}\)

Nên: \(1+\frac{1}{55}>1+\frac{1}{81}\)

=>\(\frac{8.7}{5.11}>\frac{2.41}{3^4}\)

Vậy:\(\frac{8.7}{5.11}>\frac{2.41}{3^4}\)