I hope this helps... if not let me know and I'll try to help again :)
Umm, I think it is the first one.
Answer:
The answer is 0
Step-by-step explanation:

As

, the sequence

converges to zero.
If you're talking about the infinite series

well we've shown by comparison that this series must also converge because we know any geometric series

will converge as long as

.

By inspection 1 is a root of y ,
Hence , (x-1) is a factor of y ,

Hence , the 2 other roots are -1/2 and 3 , and the above graphs confirms the same.
Hope it helps you :)