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เอ๋...อัตราส่วนร่วมของลำดับนี้มีค่าเท่าใดนะ
Test Description: หาอัตราส่วนร่วม(r) ของลำดับเรขาคณิต
Instructions: Answer all questions to get your test result.
1) 1, -2, 4, … , -512
A
1
B
-2
C
2
D
-4
2) 3, 6, 12, …,96
A
3
B
4
C
6
D
2
3) 1, 3, 9, … , 729
A
6
B
7
C
3
D
9
4) 1, 5, 25, …, 625
A
15
B
25
C
10
D
5
5) 1, 10, 100, … , 1000000
A
10000
B
100
C
1000
D
10
6) 10000, 1000, 100, …, 0.001
A
100
B
0.1
C
0.01
D
10
7) 0.2, 0.002, 0.00002, …, 0.00000000002
A
0.001
B
0.01
C
0.1
D
0.02
8) -8, 8, -8, 8, -8, …
A
-1
B
-8
C
8
D
1
9) 1000, 500, 250, 125, …
A
5
B
0.2
C
0.5
D
2
10) 1, 11, 121, 1331, …
A
1.2
B
11
C
12
D
1.1
*select an answer for all questions
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