what is the common difference of this arithmetic sequence?

18; 7; -7; -15

2007-11-27 08:31:05 · 1 answers · asked by Still Doll << 4 in Science & Mathematics ➔ Mathematics

1 answers

There isn't...

The differences are:
11, 14, 8

If it was a typo, and you meant to say 18, 7, *-4*, -15 then the common difference is 11.

18 subtract 11 = 7
7 subtract 11 = -4
-4 subtract 11 = -15

2007-11-27 08:34:07 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋

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