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Geometric Sequence Quiz
By Jalethea Byrd
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Last updated about 6 years ago
20 questions
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Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
11.
Question 12
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Question 13
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Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Question 18
18.
Question 19
19.
Question 20
20.
Find a
12
in the sequence -1, -3, -9, -27, ...
-117147
-59049
118098
-19683
Find a
9
in the sequence 4, 8, 16, 32, ...
768
512
384
1024
Find a
11
in the sequence -3, 6, -12, 24, ...
-1/256
-236196
-3072
-4096
Find the common ratio: 4, -16, 64, -256, ...
r=-2
r=-4
r=2
r=4
Find the common ratio: 64, -16, 4, -1, ...
r=4
r=-4
r=-1/4
r=-8
Which formula is used to find the explicit equation for geometric sequences?
a
n
=a
n-1
r
a
n
=a
n-1
+d
a
n
=a
1
r
n-1
a
n
=a
1
+d(n-1)
Which formula is used to find the recursive equation for geometric sequences?
a
n
=a
n-1
r
a
n
=a
1
r
n-1
a
n
=a
1
+d(n-1)
a
n
=a
n-1
+d
What is the recursive rule for the sequence: 11,22,44, 88, ...
a
n
=11(2)
n-1
a
n
=2(11)
n-1
a
n
=11(2)
a
n
=2a
n-1
Given the sequence: 125, 25, 5, ...
Write the explicit rule.
t(n)=625(1/5)
n
t(n)=125+5n
t(n)=625(5)
n
t(n)=125(5)
n
Find the general rule for: 64, -32, 16, -8, ...
(-32)
n-1
(32)
n-1
64(-1/2)
n-1
64(1/2)
n-1
Write an explicit rule for the general term of the sequence 5, 15, 45, ...?
a
n
=5+3(n-1)
a
n
=3(5)
n-1
a
n
=3a
n-1
a
n
=5(3)
n-1
Find the 11th term for: 64, -32, 16, -8, ...
-0.0625
-0.03125
0.03125
0.0625
Which sequence is represented by the equation 2(7)
n-1
?
2, 14, 98, 686, ...
7, 14, 28, 56, ...
7, 9, 11, 13, ...
2, 9, 16, 23, ...
Is the sequence geometric or arithmetic?
3, 6, 9, 12, ...
arithmetic
geometric
neither
Is the sequence geometric or arithmetic?
6, 18, 54, ...
arithmetic
geometric
neither
Is the sequence 9, 99, 999, 9999, ... geometric?
no
yes
What is the 7th term for the rule:
f(n)=3(0.8)
n-1
0.629
2.4
0.786
14.4
What is the explicit rule for the sequence:
11, 22, 44, 88, ...
a
n
=2(11)
n-1
a
n
=2(11)
a
n
=11(2)
n-1
The first term of a geometric sequence is 18 and the common ratio is 3.5. What is the 5th term of the sequence?
2913.24
2701
2701.125
2700
What is the 10th term of the geometric sequence below?
2, -6, 18, ...
39366
-39366
23987
-40000