Lesson
Geometric Sequences
13 minutes ago by
qspriggs
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• Slide 1
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Geometric Sequences

At this point, you should have already watched the teacher time notes. Please use this activity to solidfy your knowledge on Geometric Sequences before taking the "Ticket" for this lesson.

• Slide 2
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Determine if a sequence is geometric

• Question 3
60 seconds
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Q. Is the sequence 2, 4, 12, 48,... geometric?
yes
no
• Question 4
60 seconds
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Q. Is the sequence 256, 64, 16, 4,... geometric?
yes
no
• Slide 5
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Find the common ratio

• Question 6
300 seconds
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Q. What is the common ratio of the geometric sequence below?
5, 25, 125, 625...
25
20
5
4
• Question 7
120 seconds
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Q. Find the common ratio: 4, -16, 64, -256, ...
r = -4
r = 2
r = -2
r = 4
• Slide 8
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Find the next three terms

• Question 9
180 seconds
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Q. Find the next three terms: -4, -12, -36, -108, ...
36, -108, 324
-324, -972, -2916
324, -972, 2916
-108, 324, -972
• Question 10
180 seconds
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Q. Find the next three terms: 4, 12, 36, 108, ...
324, 972, 2916
972, 2916, 8748
405, 1215, 3645
• Slide 11
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• Question 12
30 seconds
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Q. Find the 11th term for:  64, -32, 16, -8, …
-.0625
.0625
-.03125
.03125
• Question 13
30 seconds
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Q. Which sequence is represented by the equation 2(7)n-1 ?
7, 14, 28, 56...
2, 14, 98, 686...
2, 9, 16, 23...
7,9,11,13...
• Question 14
180 seconds
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Q. Write an explicit rule for the general term of the sequence 5, 15, 45, . . . ?