Engineering Board Exam Reviewer · Sequences and Series · easy
Find the sum of the first 5 terms in the sequence whose general term is 2n-1.
- 16
- 8
- 31
- 15
Answer
C. 31
Solution
Sum = 1+2+4+8+16 = 31 (a GP with a=1, r=2, 5 terms).
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