Cho \({S_n} = \frac{1}{{1.2}} + \frac{1}{{2.3}} +...

Câu hỏi: Cho \({S_n} = \frac{1}{{1.2}} + \frac{1}{{2.3}} + ... + \frac{1}{{n\left( {n + 1} \right)}},n \in {N^ * }\). Tính S₂?

A. \(\frac{2}{3}\)

B. \(\frac{1}{3}\)

C. \(\frac{4}{3}\)

D. 2