Geometric Arithmetic Sequence

Is the sequence geometric or arithmetic?
6, 18, 54...

• Arithmetic

• Geometric

• Neither

Is the sequence arithmetic, geometric, or neither:

17, 9, 1, -7, ...

• Arithmetic

• Geometric

• Neither

Is the sequence -4, -12, -36, -108,... arithmetic, geometric, or neither?

• arithmetic

• geometric

• neither

A grocer is creating a display of cans. There are 40 cans on the 1st (bottom) row, 38 cans on the 2nd row, 36 cans on the 3rd row, and so on. How many cans will be on the 15th row?

• 32 cans

• 10 cans

• 12 cans

• 68 cans

a₃ = 225 and a₅ = 5625

Find the common ratio of the geometric sequence.

• 3

• 4

• 5

• 25

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

• u_n = 2(11)^n-1

• u_n = 11(2)

• u_n = 11(2)^n-1

What is the common ratio of the geometric sequence below?
5, 25, 125, 625...

• 25

• 20

• 5

• 4

What is the common ratio of this geometric sequence?

• -5/2

• -2/5

• 2/5

• 5/2

Which sequence is a geometric sequence with a common ratio of 2?

• 5, 3, 1, -1, ...

• 5, 7, 9, 11, ...

• 5, 10, 20, 40, ...

• 5, 15, 45, 135, ...

Which of the following best describes this sequence?
\left\{2,\ -4,\ \ 8,\ -16,\ 32,\ ...\right\}

• Arithmetic

• Geometric

• Neither

• Both