AnswersSummer 2026 Common Core Algebra I - MA3109 B-IC MEF22QXVGeometric Sequences

Geometric Sequences Answers

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Pablo generates the function to determine the xth number in a sequence.

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A
f(x + 1) = f(x)
Option A
B
f(x) = f(x + 1)
Option B
C
f(x + 1) = f(x)
Option C
D
f(x) = f(x + 1)
Option D
2
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Which formula can be used to describe the sequence?, −4, −24, −144,...

Question illustration
A
f(x) = 6
Option A
B
f(x) = −6
Option B
C
f(x) = (6)x − 1
Option C
D
f(x) = (−6)x − 1
Option D
3

Natalia is writing a recursive formula to represent the sequence.8, 12, 18, 27, ...What value should she use as the common ratio in the formula?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
4

Which graph represents a geometric sequence?

A
On a coordinate plane, 5 points are plotted. The points are (1, 1), (2, 3), (3, 5), (4, 7), (5, 9).
Option A
B
On a coordinate plane, 4 points are plotted. The points are (1, 1), (2, 2), (3, 4), (4, 8).
Option B
C
On a coordinate plane, 3 points are plotted. The points are (1, 2), (4, 4), (9, 6).
Option C
D
On a coordinate plane, 3 points are plotted. The points are (1, 1), (2, 4), (3, 9).
Option D
5

Sebastian writes the recursive formula f(x+1) = 4f(x) to represent a geometric sequence whose second term is 12.

A
f(x) = 12(4)x
B
f(x) = 3(4)x − 1
C
f(x) = 4(12)x
D
f(x) = 4(3)x − 1
6

Negative 2 and two-thirds, negative 5 and one-third, negative 10 and two-thirds, negative 21 and one-third, negative 42 and two-thirds, ellipsis

Question illustration
A
f(x + 1) = –2f(x)
B
f(x + 1) = f(x)
Option B
C
f(x + 1) = f(x)
Option C
D
f(x + 1) = 2f(x)
7

The points shown on the graph represent the numbers in a geometric sequence.

Question illustration
A
1
B
2
C
3
D
8
8

Isaak is writing an explicit formula to represent the sequence.64, 112, 196, 343, ...What value should he use as the common ratio in the formula? Write the answer as a decimal rounded to the nearest hundredth.

A
0.75
B
1.75
C
58
D
279
9

Which is the graph of the sequence defined by the function f(x + 1) = f(x) if the initial value of the sequence is 108?

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A
Option
B
Option
C
Option
D
Option
10

Select two options.

A
The graph will show exponential growth.
B
The graph will appear linear.
C
The domain will be the set of natural numbers.
D
The range will be the set of natural numbers.
E
The graph will show exponential decay.

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