I. –3, 1, 5, 9, ...
II. 1, 2, 4, 8, ...
III. 4, -12, 36, -108, ...
IV. 7, 14, 21, 28, ..
Which of these are arithmetic sequences?
A. I and III
B. I and IV
OC. ,II, and IV
OD. IV only

  B.  I and IV

Step-by-step explanation:

The first differences of the terms shown are ...

  I. 4, 4, 4 . . . . a common difference of 4

  II. 1, 2, 4 . . . no common difference

  III. -16, 48, -144 . . . no common difference

  IV. 7, 7, 7 . . . . a common difference of 7

An arithmetic sequence is characterized by a common difference between terms. Only I and IV have a common difference between terms.

Only I and IV are arithmetic sequences.

-14 is the answer

hope this : ))

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step-by-step explanation:

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