Question

Which sequences are arithmetic? Select three options.

–8.6, –5.0, –1.4, 2.2, 5.8, …
2, –2.2, 2.42, –2.662, 2.9282, …
5, 1, –3, –7, –11, …
–3, 3, 9, 15, 21, …
–6.2, –3.1, –1.55, –0.775, –0.3875,

Answer 1

Answer:

Below.

Step-by-step explanation:

Number 1 is arithmetic . The common difference (d) = 3.6.

Number  3    ..    ..    ..       .... .. ....................................  d = -4.

Number   4 ........................................................................ d = 6.

Answer 2

Answer: A C D (in green in file)

Step-by-step explanation:

Here is a excel file that do the job.

Data are in lines 1 and 2.

there are only 2 formula.(in B1 and B2)

Others cells are just copied (incrementiel)