Geometric and Arithmetic Sequence

What is the common difference in this sequence?

• 1/2

• 2

• -8

• -16

• 1/2

• 2

• 12

• 24

Which sequence is an arithmetic sequence?

• 3, 6, 2, 7, ...

• 3, 6, 12, 24, ...

• 3, 6, 10, 15, ...

• 3, 7, 11, 15, ...

Arithmetic, geometric, or neither?

100, 50, 25, 12.5, ...

• Arithmetic

• Geometric

• Neither

Arithmetic, geometric, or neither?

4, 9, 14, 19, ...

• Arithmetic

• Geometric

• Neither

Find the common difference:

25, 13, 1, -11, ...

• 12

• -12

• 8

• -8

Find the common ratio:

2, 8, 32, 128, ...

• 1/4

• 4

• 1/6

• 6

What is the formula for the sequence: 11, 22, 44, 88...

• a_n = 2(11)^n-1

• a_n = 11 + 2(n-1)

• a_n = 11(2)^n-1

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

• 19,683

• 6,561

• 2,187

• 729

What is the term position of 31,250 in the following geometric sequence? 2, 10, 50,...

• a₅

• a4

• a₂₀

• a₇