8. Use the Comparison Test or Limit Comparison Test to determine whether each series is

convergent or divergent. Carefully explain your justification for using each test.

(2) Σ

(b)

8 WI

2k-3

k4-6

4k²-k

k³+k+1

(0) Σ

1 + cos k

8k

k=0

(1) Σ

k=1

1

k² arctan(k)