\(A=\frac{5}{7}\cdot\frac{2}{3}\cdot\frac{7}{5}\cdot\frac{3}{2}\cdot\frac{19}{43}\)
\(=(\frac{5}{7}\cdot\frac{7}{5})\cdot(\frac{2}{3}\cdot\frac{3}{2})\cdot\frac{19}{43}\)
\(=1\cdot1\cdot\frac{19}{43}=\frac{19}{43}\)
A=5/7.2/3.7/5.3/2.19/43
A=5.2.7.3.19/7.3.5.2.43
A=19/43
Nhớ k cho mình nhé
A=5/7.2/3.7/5.3/2.19/43
A=(5/7.7/5).(2/3.3/2).19/43
A=1.1.19/43
A=19/43
~hok tốt~
\(\frac{5}{7}.\frac{2}{3}.\frac{7}{5}.\frac{3}{2}.\frac{19}{43}=\frac{5.2.7.3.19}{7.3.5.2.43}=\frac{19}{43}\)