Topic 6.4: Geometric Sequences

What does r represent?

• Radical

• Common difference

• Common ratio

What does a₁ represent?

• Any term

• First term

• Last term

What does n represent?

• Number

• Nothing

• Term you are trying to find

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

• yes
• no

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic
• geometric
• neither

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic
• geometric
• neither

Find the common ratio for the geometric sequence.

• 10
• 1/2
• 2
• 4

Find the common ratio for the geometric sequence.

• 1
• -1
• 7
• -7

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

• 4
• 3
• 2
• 6

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1
• a_n = 3(4)^n-1
• a_n = -4(3)^n-1
• a_n = 3(-4)^n-1