Which of these is not a geometric sequence?
3, 6, 12, 24, ...
250, 50, 10, 2, ....
5, 15, 45, 135, ...
4, 12, 20, 28, ...
4, 12, 20, 28
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What kind of sequence are -3, 6, -12, 24, …? *
1 point
Arithmetic Sequence
Geometric Sequence
Neither
What kind of sequence are 5, 9, 10, 12, …? *
1 point
Arithmetic Sequence
Geometric Sequence
Neither
In the geometric sequence -3, 6, -12, … what is the 10th term? *
1 point
512
-512
1536
-1536
This is a required question
In the geometric sequence 2, 6, 18, … what is the 9th term *
1 point
4,374
13,122
26,244
39,366
This is a required question
What kind of sequence are 9, 12, 15, 18, … ? *
1 point
Arithmetic Sequence
Geometric Sequence
Neither
What is the common ratio of the given geometric sequence?1, 6, 36, …
1 point
1/6
6
-1/6
-6
Given a1 = -3, r = 2. What are the first 5 terms of a geometric sequence? *
1 point
-3, 6, -12, 24, -48
-3, -6, -12, -24, -48
-3, 6, 12, 24, 48
3, 6, 12, 24, 48
This is a required question
In the geometric sequence 32, 16, 8, … find the 12th term. *
1 point
1/64
64
1/2048
2048
This is a required question
What are the missing terms of the given geometric sequence?5, ___, 125, ____ ,____ *
1 point
2nd term: 25 4th term: 375 5th term: 3125
2nd term: 75 4th term: 625 5th term: 2275
2nd term: 75 4th term: 373 5th term: 2275
2nd term: 25 4th term: 625 5th term: 3125
This is a required question
Given a1 = 2/3, r = 3. What are the first 5 terms of a geometric sequence? *
1 point
2, 6, 18, 54, 162
2, 2/6, 2/18, 2/54, 2/162
2/3, 2, 6, 18, 54
2/3, 2/9, 2/27, 2/81, 2/243
This is a required question
Determine the common ratio of the given geometric sequence.4, -4, 4, -4, … *
1 point
-1
1
-4
4
This is a required question
Determine the common ratio of the given geometric sequence. 81, 27, 9, … *
1 point
3
-3
1/3
-1/3
This is a required question
Given a1 = 4, r = 1/2. What are the first 5 terms of a geometric sequence? *
1 point
2, 1, 1/2, 1/4, 1/8
4, 2, 1, ½, 14
4, 2, 1, ½, 1/4
2, ½, ¼, 1/8, 1/16
This is a required question
In the geometric sequence -3/8, -3/4, -3/2, … what is the 8th term? *
1 point
3/48
-3/48
48
-48
This is a required question
Find the missing terms of the given geometric sequence. ___, ___, ___, 8, 16 *
1 point
0,2,4
1,2,4
-2,2,4
-1,2,4
This is a required question
To determine which of these sequences is not a geometric sequence, we need to check if the ratio between consecutive terms is constant.
For the first sequence:
3/6 = 0.5
6/12 = 0.5
12/24 = 0.5
The ratio between consecutive terms in the first sequence is 0.5, which is constant. Therefore, the first sequence is a geometric sequence.
For the second sequence:
250/50 = 5
50/10 = 5
10/2 = 5
The ratio between consecutive terms in the second sequence is 5, which is constant. Therefore, the second sequence is also a geometric sequence.
For the third sequence:
5/15 = 1/3
15/45 = 1/3
45/135 = 1/3
The ratio between consecutive terms in the third sequence is 1/3, which is constant. Therefore, the third sequence is a geometric sequence as well.
For the fourth sequence:
4/12 = 1/3
12/20 = 3/5
20/28 = 5/7
The ratio between consecutive terms in the fourth sequence is not constant. It changes from 1/3 to 3/5 to 5/7. Therefore, the fourth sequence is not a geometric sequence.
In conclusion, the fourth sequence (4, 12, 20, 28, ...) is not a geometric sequence.
This site explains geometric sequence.
http://www.purplemath.com/modules/series3.htm