UNIT 10 Lesson 1 Intro to Sequences

Is the sequence arithmetic?

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

• Yes

• No

Find the sequence 10, 20, 30, 40.........

• Multiply by 10
• Add 10  
• Multiply by 2

Is the sequence geometric? If so, identify the common ratio.

6, 12, 24, 48

• yes, 2

• yes, -2

• yes, 4

• no

Find the next three terms in the arithmetic sequence: -33, -24, -15, -6, ...

• -1, 7, 15
• -5, 2, 9
• 3, 12, 21
• -65, -73, -81

What kind of sequence is the pattern 400, 200, 100, 50, 25, ...?

• Arithmetic
• Geometric
• Neither

225,75,25,8.33

• Geometric sequence with a common ratio of 1/3
• Geometric sequence with a common ration of 3
• Arithmetic sequence with a common difference of 58
• Common difference of 3

Decide if the sequence is arithmetic, geometric or neither:
1, 1, 2, 3, 5, 8, 13

• Arithmetic
• Geometric
• Neither

Which of the following is not an arithmetic sequence?

• 1/2, 1, 3/2, 2

• 11, 14, 17, 20

• 2, 4, 8, 16

• 5, 2, -1, -4

Identify the common difference of the sequence below:

-2.3, -1.1, 0.1, 1.3,...

• -1.2

• 1.3

• 1.2

• -1.3

3, 9, 15, 22, ...

Is this sequence arithmetic, geometric, or neither?

• arithmetic (common difference d = 6)

• geometric (common ratio r = 4)

• neither (no common difference OR common ratio) neither (no common difference OR common ratio)