which is it?
what's the difference?
what's the formula?
what the sigma?
final jeopardy!
300

sequence or series?

2, 3, 5, 7, 11, 13

*bonus: name the pattern*

sequence

*bonus: prime numbers*

300

find the common difference or the common ratio:

78, 75, 72, 69, 66, ...

`d=-3`

300

what is the explicit formula for arithmetic sequence?

`an=a1+(n-1)d`

300

find the sum:

`1-1/2+1/4-1/8+...`

`2/3`

400

finite or infinite?

2, 4, 6, 8, 10, 12, 14, 16, 18, 20

finite

400

find the common difference or the common ratio:

`3/32,3/16,3/8,3/4,3/2,...`

r=2

400

what is the explicit formula for a geometric sequence?

`an=a1*r^(n-1)`

400

`sum_(n=1)^8(3n+1)`

116

500

arithmetic, geometric, or neither?

-4, 2, 8, 14

arithmetic

500

find the common difference or the common ratio:

1620, 540, 180, 60, ...

`r=1/3`

500

what is the formula for the sum of an infinite geometric series?

`S=(a1)/(1-r)`

500

`sum_(n=2)^6(-2)^(n-1)`

-22

500

Find the sum:

`6+5+25/6+...`

36