Evaluate the series . 131+432+733+1034+⋯
How do we know where it ends?
It doesn't end, it's a infinite geometric sequence.
Ooh, sorry I can't help you. I haven't learned this yet...
∑[(3n - 2) / 3^n, n, 1, ∞] = 5 /4
Call this series S. We compare S to 1/3 S:
Subtracting the second equation from the first, we see that
Therefore,
Hi Spongebob,
Deleted, my apologies.
Your answer is very interesting.
I tried this answer and it is correct, one of the users above got the same answer as me
Yes, sorry, my mistake.
It's ok, it happens to everyone.
+1072 
+1072 
