12. (4 pts) A sequence begins 2,5,8,11,14,...
(a) Does this sequence appear to be arithmetic, geometric, or neither? Why/how do you know?
(b) Find a formula for the nth term $a_n$ of the sequence.
(c) Find the 100th term of the sequence.
13. (4 pts) A sequence begins 192,48,12,3,...
(a) Does this sequence appear to be arithmetic, geometric, or neither? Why/how do you know?
(b) Find a formula for the nth term $a_n$ of the sequence.
(c) Find the 10th term of the sequence.