Find the Sum of the Sequence $$\sum _ { k = 1 } ^ { 4 } 3 ^ { k }$$

question 221

Multiple Choice

Find the sum of the sequence.
- $$\sum _ { k = 1 } ^ { 4 } 3 ^ { k }$$

• A) 39
• B) 30
• C) 84
• D) 120

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