Question

For questions 1 and 2, identify each sequence as arithmetic, geometric,

both, or neither.

1. 7,9,11,13,...

A. arithmetic
B. geometric
C. both
D. neither



2. 2,1 ,1/2, 1/4

A. arithmetic
B. geometric
C. both
D. neither


For questions 3 and 4, write a rule for the sequence.

3. 1,2,4,8

A. Start with 1 and then add 1 repeatedly

B. Start with 1 and then add multiples of 2 repeatedly

C. Start with 1 and then add multiples of 2 repeatedly

D. Start with 1 and then divide by 2 repeatedly



4. 50, 40, 30, 20,...

A. Start with 50 and then add 10 repeatedly

B. Start with 50 and then add -10 repeatedly

C. Start with 20 and then add 10 repeatedly

D. Start with 50 and then add multiples of 10 repeatedly


5. Find the next three terms in the sequence.

4, 12, 36, 108


A. 304, 912, 2736
B. 324, 972, 2916
C. 354, 1062, 3186
D. 332, 996, 2988


Please check my answers
1. A
2. B
3. C
4. A
5. A

Please help take your time to check them im not in a rush

Answer 1

actually #5 is b. 324, 972, 2, 916

Answer 2

(1) It is an arithmetic sequence since it has a common difference of 2. The answer is letter A.
(2) It is a geometric sequence since it has a common ratio of 1/2. The answer is letter B.
(3) C. Start with 1 and then add multiples of 2 repeatedly
(4) B. Start with 50 and then add -10 repeatedly
(5) C. 354, 1062, 3186