dt 3. Solve the IVP 12- + 2tr = In(t) , r(1) = 2 (3 points) 2 minin convergen cy diverge 4. Determine whether the sequence an = In (2n2 + 1) - In (n2 + 1) converges or diverges. If it converges, find the limit. (2 points) 18 5. Determine whether the series 4n+15-^ converges or diverges. If it converges, find its sum. n=1 (3 points)