Arithmetic Sequences
Geometric Sequences
Non-Arithmetic/Geometric Sequences
Sums of Sequences
100
A sequence starts with 5 and each term is found by adding 10 to the next term. What is the 15th term?
145
100
A sequence starts with 200 and each subsequent term is found by dividing the previous term by 3.
What is the sixth term? (Round to two decimal places)
0.82
100
What is the 25th term?
325
100
What is the sum of the first 9 terms of the following arithmetic sequence?
a(n) = a(n-1) + 1.15
a(1) = -20
-138.6
200
Write the recursive formula for the following arithmetic sequence:
115, 100, 85....
f(n) = f(n-1) - 15
f(1) = 115
200
Write the recursive formula for the following geometric sequence:
2, 16, 128...
g(n) = g(n-1)*8
g(1) = 2
200
Write a recursive formula for the following sequence:
1, 11, 111, 1111....
a(n) = 10*a(n-1)+1
a(1) = 1
200
What is the sum of the first 7 terms of the following geometric sequence:
60, 30, 15...
119.06
300
What is the 10th term of the following arithmetic sequence?
a(n) = a(n-1) + 1.15
a(1) = -20
-9.65
300
What is the 7th term of the following geometric sequence:
60, 40, 26.67... (Round to two decimals)
5.27
300
Find the fourth term of this sequence:
3, 9, 81...
6561
300
What is the sum of the first 10 terms?
220