Section 5.1 12. Find a formula for the general term a of the following sequence. {1, 0, -1, 0, 1, 0, -1, 0, ...} (Hint: Find where sin(x) takes these values) 48. Determine the limit of the sequence or show that the sequence diverges. If it converges, find its limit. In (n) a = In (2n) Section 5.2 80. Use the sequence of partial sums to determine whether the series converges or diverges. E(1 - (- 1)") n=1 102. Evaluate the following telescoping series or state whether the series diverges. 1 13 (n+1)