8. (10 points) (a) [5 points] Let n 2 2 be a natural number. Compute 1 r ln" () (b) [2 points] Compute the following limit In(3 +x' + +1) lim T-+00 In(z3) (c) [3 points] Determine whether vo2 + aln'(x3+o' + +1) converges. Explain your reasoning