Question

Which of these is not a geometric sequence?
3, 6, 12, 24, ...
250, 50, 10, 2, ....
5, 15, 45, 135, ...
4, 12, 20, 28, ...

Answer 1

This site explains geometric sequence.

http://www.purplemath.com/modules/series3.htm

Answer 2

4, 12, 20, 28
have a great day!:)

Answer 3

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