Geometric Sequence Review

Find the common ratio for the geometric sequence.

• 10
• 1/2
• 2
• 4

Tags

CCSS.HSF.BF.A.2

Find the common ratio: 64, -16, 4, -1, ...

• r = -8
• r = -1/4
• r = -4
• r = 4

Tags

CCSS.HSF.BF.A.2

Write the explicit formula for the geometric sequence.

• a_n = 7(1)ⁿ
• a_n = 7(-1)ⁿ
• a_n = 7(-1)^n-1
• a_n = -1(7)^n-1

Tags

CCSS.HSF.BF.A.2

This image shows how a certain bacteria grows in a petri dish. What is the common ratio of this sequence?

• 4
• 3
• 2
• 6

Tags

CCSS.HSF.BF.A.2

Find the first four terms of the sequence given the rule:
a_n = 4(5)^n-1

• 20, 100, 500, 2500
• 5, 20, 80, 320
• 4, 20, 100, 500
• 4, 9, 14, 19

Tags

CCSS.HSF.BF.A.2

The next term of sequence 2,4,8,16 is

• 64
• 108
• 32
• 20

Tags

CCSS.HSF.BF.A.2

Find the missing term of the geometric sequence: 45, ______, 1620

• 9720
• 51
• 6
• 270

Tags

CCSS.HSF.BF.A.2

• 8192

• 32768

• 2048

• 512

Tags

CCSS.HSF.BF.A.2

What is a₅?

• -1875

• -550

• -1055

• Not enough information

Tags

CCSS.HSF.BF.A.2

You have $729 in the bank on Day 1, $243 on Day 2, and $81 on Day 3. Write the explicit formula that expresses the sequence.

• a_n = 729(1/3)^n-1

• a_n = 729(3)^n-1

• a_n = 1/3(a_n-1)

• a_n = 1/3(729)^n-1

Tags

CCSS.HSF.BF.A.2