Given Are the First Three Terms of a Sequence That $2,6,18 , \ldots$

question 161

Multiple Choice

Given are the first three terms of a sequence that is either arithmetic or geometric. If the sequence is arithmetic, find a1
and d. If a sequence is geometric, find a1 and r.
- $2,6,18 , \ldots$

• A) \(a _ { 1 } = 2 , r = \frac { 1 } { 3 }\)
• B) \(a _ { 1 } = 2 , r = - 3\)
• C) \(a _ { 1 } = 2 , r = 3\)
• D) \(a _ { 1 } = 2 , d = 3\)

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