Geometric Sequences

What type of sequence is the following:

10,8,6,4,...

• Arithmetic

• Geometric

• None of these

What type of sequence is the following:

2, 7, 15, 26, 40, 57, ...

• Arithmetic

• Geometric

• None of these

What type of sequence is the following:

625, 125, 25, 5, 1 ...

• Atithmetic

• Geometric

• None of these

Which of the following recursive formulas represents the given sequence.

4, 12, 20, 28, 36, ...

Which of the following recursive formulas represents the given sequence.

7, 14, 28, 56, 112, ...

Find a₇.

15, 20, 25, 30, 35, ...

• 25

• 35

• 40

• 45

Write the explicit formula for the geometric sequence.

• a_n = 10(2)^n-1
• a_n = 2(10)^n-1
• a_n = 10(2)ⁿ
• a_n = 2(10)ⁿ

Write the explicit formula for the geometric sequence.

• a_n = 2(100)^n-1
• a_n = 100(2)^n-1
• a_n = 100(1/2)^n-1
• a_n = (1/2)(100)^n-1

Which of the explicit rules can represent the following sequence:

125, 25, 5, ...

(Select all that apply)