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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
2
B
1
C
-4
D
-2
2) 3, 6, 12, …,96
A
4
B
3
C
2
D
6
3) 1, 3, 9, … , 729
A
7
B
9
C
6
D
3
4) 1, 5, 25, …, 625
A
10
B
15
C
25
D
5
5) 1, 10, 100, … , 1000000
A
10
B
100
C
10000
D
1000
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
0.1
B
0.01
C
0.001
D
0.02
8) -8, 8, -8, 8, -8, …
A
-1
B
1
C
8
D
-8
9) 1000, 500, 250, 125, …
A
2
B
0.5
C
0.2
D
5
10) 1, 11, 121, 1331, …
A
1.1
B
11
C
12
D
1.2
*select an answer for all questions
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