Staar Algebra Arithmetic and Geometric Sequences Creating Explicit Rules

Write the explicit formula for the sequence.

9, 5, 1, -3, ...

Write the explicit formula for the sequence.

216, 72, 24, 8, ...

What is the common ratio of this sequence?
{2, 10, 50, 250, ... }

• 1,250
• 5
• 10
• 50

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

• -4
• 10
• -122
• 174

What is the explicit rule for the geometric sequence: 11, 22, 44, 88...

• a_n = 2(11)^n-1

• a_n = 11(2)

• a_n = 11(2)^n-1

Create the explicit formula for the arithmetic sequence: 2, 8, 14, ...

• a_n=2+6(n-1)

• a_n=2+6^(n-1)

• a_n=6(n-2)

• a_n=14-6(n - 1)

What is a₇ for the given sequence shown below?

5, 2, –1, –4, . . .

• -13

• -11

• -18

• -22

Which sequence is an arithmetic sequence?

• 3, 6, 2, 7, ...

• 3, 6, 12, 24, ...

• 3, 6, 10, 15, ...

• 3, 7, 11, 15, ...

Is this sequence Arithmetic, Geometric, or Neither?
{2, 9, 7, 14, 12, 19, ... }

• Arithmetic
• Geometric
• Neither

What is a₅ for the sequence below?

a_n = 5 ⋅ 2^(n-1) 

• a₅ = 160
• a₅ = 40
• a₅ = 10
• a₅ = 80