Find the Indicated Sum $$\sum _ { \mathrm { i } = 1 } ^ { 5 } 4 ( - 2 ) ^ { \mathrm { i } }$$

question 249

Multiple Choice

Find the indicated sum. Use the formula for the sum of the first n terms of a geometric sequence.
- $$\sum _ { \mathrm { i } = 1 } ^ { 5 } 4 ( - 2 ) ^ { \mathrm { i } }$$

• A) \(- 88\)
• B) \(- 340\)
• C) 8
• D) 40

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