need help understanding

Section 10.6 In problem 1 you are given the values of the first five partial sums of a series. Is the series an alternating series? If not why? Problem 1: 2,1,3,2,4 Problem 2: In problem 2 determine whether the given series converge or diverge. 1 n + 5 Section 10.7 Problem 3: In problems 3 determine whether the given series Converge Absolutely, Converge Conditionally, or Diverge and give reasons for your conclusions. (- 1 )" 1 n+ 2 1=1 Problem 4 Show that : n! 1 (n+ 2)! (n+ 1)(n+2)