Determine Whether the Sequence Is Arithmetic $a _ { n } = - 8 \left( \frac { 1 } { 5 } \right) ^ { n }$

question 23

Multiple Choice

Determine whether the sequence is arithmetic. If so, find the common difference. (Assume that n begins with 1.) $a _ { n } = - 8 \left( \frac { 1 } { 5 } \right) ^ { n }$

• A)-8
• B)5
• C) \(\frac { 1 } { 5 }\)
• D)8
• E)not arithmetic

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