1/ Cho \(M=\frac{34}{7.13}+\frac{51}{13.22}+\frac{85}{22.37}+\frac{68}{37.49}\)
\(N=\frac{39}{7.16}+\frac{65}{16.31}+\frac{52}{31.43}+\frac{26}{43.49}\)
Tính tỉ số \(\frac{M}{N}\).
2/ So sánh \(A\)và \(B\), biết:
\(A=\frac{20}{39}+\frac{22}{27}+\frac{18}{43}\)
\(B=\frac{14}{39}+\frac{22}{29}+\frac{18}{41}\)