Use the Formula for the General Term of a Geometric $$\mathbf { a } _ { 1 }$$

question 135

Multiple Choice

Use the Formula for the General Term of a Geometric SequenceUse the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the
sequence with the given first term, $$\mathbf { a } _ { 1 }$$ , and common ratio, r.
-Find $a _ { 4 }$ when $a _ { 1 } = 2000 , r = - \frac { 1 } { 2 }$ .

• A) \(- 250\)
• B) \(- 125\)
• C) 250
• D) \(- 25\)

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