Staar Algebra Arithmetic and Geometric Sequences

Find the EXPLICIT arithmetic sequence formula for the following data set: 2, 4, 6, 8...

• 2n

• 2n - 2

• 2n + 4

• 4n

What is the previous term for:
-6, 1, 8, 15...

• -13

• 13

• 1

• -12

Find the 22nd term. a₁=10, d=5

• 115

• 200

• 10

• 220

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

• 2

• 1/2

• -14

• -7

Find the next three terms: 4, 12, 36, 108, ...

• 324, 972, 2916

• 972, 2916, 8748

• 405, 1215, 3645

Given the sequence:
125, 25, 5, ....
Write the explicit rule:

•  y = (125)(5)^(x)

•  y = 125(1/5)^(x)

•  y = 625(5)^(x)

•  y = 125 + 5x

Find the 32nd term of this sequence.
34, 37, 40, 43, ...

• 32

• 64

• 127

• 356

What is the 10th term of the sequence an = 20-2n

• 40

• -20

• 7

• 0

The explicit formula for a sequence is a_n = 5 − 3n. What is the value of a₂₂ ?

• a₂₂ = -61

• a₂₂ = 61

• a₂₂ = -1

• a₂₂ = -51

Identify the common difference or ratio.

3, 7, 11, 15, ...

• Ratio, -4

• Difference, -4

• Difference, 4

• Ratio, 4