Which of the following is an arithmetic sequence?

Question

Which of the following is an arithmetic sequence?
A.
–4, –2, 0, 2, …
B.
–8, –4, –2, –1, …
C.
–4, –3, –1, 2, …
D.
–4, 0, –4, 0, …

Answer 1

 

 

A      –4, –2, 0, 2, …............  4        A is The correct answer:  arithmetic sequence, you add 2, 2, 2, 2

B      –8, –4, –2, –1, ….......   -1/2

C      –4, –3, –1, 2, ….........    6

D      –4, 0, –4, 0, …...........   -4

Answer 2

With a multiple-choice question, it is sometimes quick to eliminate answers, choose the key, then move on to the next question.

 

Sequences of numbers that follow a pattern of adding a fixed number from one term to the next are called arithmetic sequences.

 

So, for sequence A, they added:     2, 2, 2

    for sequence B. they added:         4, 2, 1

    for sequence C, they added:         1, 2, 3

    for sequence D, they added:        4, -4, 4

 

Which answer has a fixed number that is added to get the next term in the sequence?