Question 196909: Determine whether each sequence is arithmetic or geometric. Then identify the common difference or the common ratio.
14. 1854, 1788, 1722, 1656, 1590, . . .
this is an arithmetic Progression
Common Difference = -66
15. 18, 45, 112.5, 281.25, 703.125, . . .
is a Geometric Progression
Common ratio = 2.5
16. 1, -4, 16, -64, 256, . . .
Geometric Progression
Common ratio = -4
17. -125, -108, -91, -74, -57, . . .
Arithmetic Progression
Common Difference = 17
Answer by mathsteacher(28)   (Show Source):
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