Geometric Sequences and Series

Find the common ratio for the geometric sequence.

• 1
• -1
• 7
• -7

Find the common ratio for the geometric sequence.

• -4
• 4
• 1/4
• -1/4

What is the 14th term of the geometric sequence?

• 14,348,907
• 4,782,969
• 1,594,323
• 45

What is the 11th term of the geometric sequence?

• -5120
• 97,656,250
• 19,531,250
• -19,531,250

What is the sum of the first 10 terms for the following geometric series:
2-6+18-54+...

• 59048
• -29524
• 524288
• 3069

What is the sum of the first ten terms of the sequence 4, -12, 36, -144 . . . ?

• 59,050
• -59,048
• -78,732
• 118,096

What is the common ratio for the sequence:
3, 15, 75...

• 12
• 1/5
• 5/1
• 4/5

Find a₉ in the sequence 4, 8, 16, 32, ... 

• 384
• 512
• 768
• 1,024

Is the sequence -432, 72, -12, 2,...geometric?

• yes
• no

Find the common ratio: 4, -16, 64, -256, ...

• r = -4
• r = 2
• r = -2
• r = 4