Arithmetic and Geometric Sequences

Identify the common difference. 
10, 20, 30, 40, ...

• 5
• 10
• 15
• 20

Identify the common difference.
-21, -18, -15, -12, ...

• 4
• 3
• -4
• -3

Identify the common difference.
97, 86, 75, 64, ...

• 8
• 11
• -11
• -8

A numerical pattern that increases or decrease at a constant rate called __________________?

• Common denominator

• Common opposites

• Common domain

• Common difference

Is the sequence geometric or arithmetic?
3, 6, 9, 12...

• Arithmetic
• Geometric
• Neither

Is the sequence geometric or arithmetic?

6, 18, 54,162...

• Arithmetic

• Geometric

• Neither

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

• 12
• 1/5
• 5

What is the common difference of this sequence?

• 4
• 3
• 7
• 1

Which formula is used to find the explicit equation for arithmetic sequences?

• a_n = a_n-1 + d

• a_n = a_n-1 * r

• a_n = a₁ + d(n-1)

• a_n = a₁ * r^n-1

Which formula is used to find the recursive equation for arithmetic sequences?

• a_n = a_n-1 + d

• a_n = a_n-1 * r

• a_n = a₁ + d(n-1)

• a_n = a₁ * r^n-1