Chapter 13  -  Sequences and Series
Section 13.1  Arithmetic and Geometric Sequences
 
Definitions:  (yes, that's right, this is important, know these!)

Let's play guess the sequence!: I give you a sequence and you guess the type.  No fair peeking at the answers.  They are somewhere else on the page.  (well hidden of course!)
1)  3, 8, 13, 18, 23, . . .                                       2)  1, 2, 4, 8, 16, . . .
3)  24, 12, 6, 3, 3/2, 3/4, . . .                               4)  55, 51, 47, 43, 39, 35, . . .
5)  2, 5, 10, 17, . . .                                            6)  1, 4, 9, 16, 25, 36, . . .
Got them all figured out?  You can check them at the bottom of the page.   Go on if they are correct.  Review if you goofed.  (Be honest out there!)

       This is important!  (how can you guess?)   
tn is the nth term, t1 is the first term, and d is the common difference.
tn is the nth term, t1 is the first term, and r is the common ratio.


  Here's the answers to the 6 questions up stairs.

Sample problems:

Well, you have a pretty good background now in these, so let's head for section 13-2.  Recursive Definitions.