Consider the series \(\rm\displaystyle\sum_{n=1}^{\infty}\) an, where an = (−1)n+1\(\rm (\sqrt{n+1}−\sqrt{n})\). Which of the following statements is true?
1
The series is divergent.
2
The series is convergent.
3
The series is conditionally convergent.
4
The series is absolutely convergent.