Question

Which of the following are arithmetic sequences? Check all that apply.

A. 0.3, 0.6, 0.9, 1.2, 1.5, ...
B. 2, 3, 6, 11, 18, ...
C. 150, 147, 144, 142, ...
D. 2, 4, 9, 16, 25, ...

Answer 1

Answer:

Only A

Step-by-step explanation:

A. This is the arithmetic sequence, because

$0.6-0.3=0.9-0.6=1.2-0.9=1.5-1.2=0.3.$

The first term of this sequence is $0.3$ and the difference is 0.3.

B. Since $3-2\neq 6-3,$ this is not arithmetic sequence.

C. Since $150-147=147-144\neq 144-142,$ this is not arithmetic sequence.

D. Since $4-2\neq 9-4,$ this is not arithmetic sequence.

Answer 2

Answer:

Only A

Step-by-step explanation:

A. This is the arithmetic sequence, because

Step-by-step explanation: