Given Are the First Three Terms of a Sequence That $1 , - 3,9$

question 189

Multiple Choice

Given are the first three terms of a sequence that is geometric. Find a1 and r.
- $1 , - 3,9$

• A) \(a _ { 1 } = 1 ; r = 3\)
• B) \(a _ { 1 } = 1 ; r = 1\)
• C) \(a _ { 1 } = 1 ; r = - 3\)
• D) \(a _ { 1 } = 1 ; r = - 4\)

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