4. Determine whether the series

6. Determine whether the series

n²+1

72³

5. Determine whether the series (-1)" converges. Explain why.

n=1

converges. Explain why.

n!

72"

converges. Explain why.

7. Determine whether the series

(-)" converges. Explain why.

8. Determine whether the series Σn converges. Explain why.