Question

[Lê Thúy Hằng]

Tính A:

A=2/6  . 12/20 . 30/42 . 56/72 . ...... . 9900/101

Answer 1

[Huỳnh Quang Sang]

\(A=\frac{2}{6}\cdot\frac{12}{20}\cdot\frac{30}{42}\cdot\frac{56}{72}\cdot...\cdot\frac{9900}{101}\)

\(A=\frac{1}{3}\cdot\frac{3}{5}\cdot\frac{5}{7}\cdot\frac{7}{9}\cdot...\cdot\frac{9900}{101}\)

\(A=\frac{1\cdot3\cdot5\cdot7\cdot...\cdot9900}{3\cdot5\cdot7\cdot9\cdot...\cdot101}\)

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