Determine whether each sequence is arithmetic

10-1 Sequences as Functions Determine whether each sequence is arithmetic, geometric, or neither. Explain your reasoning.

  46. 1, –2, –5, –8, …

  ANSWER:   Arithmetic; the common difference is –3.

 

48. 

  ANSWER:   Geometric; the common ratio is

.

  50. 6, 9, 14, 21, …

  ANSWER:   Neither; there is no common difference or ratio.

 

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