What is the sum of the first 16 terms of the AS 11,15,15,33...? Find the last term of the general term and S16.

A. An
B. General term
C. S16

3 answers

11,15,15,33...
do not form an arithmetic sequence.
Check your typing.
11,15,17,33.. *
Not much better. Still no common difference or ratio.
The differences are 4,2,16
Not much pattern there that I can see. How does 37 look?