Practice: Arithmetic and Geometric Sequences

Front

256, 128, 64, 32, ... What's next?

Back

16

Front

To find the next term in a geometric sequence, what should you do?

Back

multiply by the common ratio r

Front

To find the next term in an arithmetic sequence…

Back

add the common difference d

Front

-21, -16, -11, -6, ... Is this sequence arithmetic, geometric, or neither?

Back

arithmetic (common difference d = 5)

Front

Sequence: aₙ = a₍ₙ₋₁₎ + 9, a₁ = 4. What are the first three terms? Options: 4, 36, 324; 4, 13, 22; 9, 13, 17; 4, 8, 12.

Back

4, 13, 22

Front

What is the 8th term in the sequence?
3, 9, 27, 81, ...

Back

6,561

Front

What is the common ratio for the sequence:
28, 14, 7, 3.5...

Back

1/2

Front

What is the 38th term of this sequence?
{26, 22, 18, 14, ... }

Back

-122

Front

First three terms of the sequence defined by a_n = 7 + (n - 1)5

Back

7, 12, 17

Front

Find the first term of the sequence where a₁₄=68 and d=3.

Back

29