General
An ordered list of numbers
A sequence
What is the fourth term in the sequence 5n?
20
5, 9, 13, 17, 21, 25
Arithmetic
40, 50, 60, 70, 80....
10n + 30
1, 4, 9, 16, 25....
Square Numbers
The numbers in a sequence
Terms
What is the ninth term in the sequence 7n?
63
4, 8, 16, 32, 64, 128, ....
Geometric sequence
-1, 3, 7, 11, 15.....
4n - 5
0, 1, 1, 2, 3, 5, 8, 13....
Fibonacci Sequence
A sequence that continues indefinitely
An infinite sequence
What is the eighth term in the sequence 3n + 5?
29
5, 9, 13, 17, 21, 25, ...
Arithmetic sequence
0, -3, -6, -9, -12....
-3n + 3
1, 3, 6, 10, 15........
The formula that links the position and term of a sequence.
nth term formula
What is the sixth term in the sequence 8n- 7?
41
1, 4, 9, 16, 25, 36
Neither (Quadratic)
0.3, 0.4, 0.5, 0.6, 0.7.....
0.1n + 0.2
1, 8, 27, 64, 125....
Cube Numbers
Name of sequence defined by having a second difference.
Quadratic
What is the fifth term in the sequence 20 - 2n?
27, 9, 3, 1, 1/3 , 1/9 , ...
Geometric sequence
0, 1/2, 1, 3/2, 2, 5/2....
1/2n - 1/2
1, 3, 5, 7, 9....
Odd Numbers