186k views
2 votes
Find the sum of the first 13 terms of the geometric sequence: 2, 4, 8, 16, 32, ...

1 Answer

2 votes

Final answer:

The sum of the first 13 terms of the given geometric sequence is 16,382, calculated using the formula for the sum of a geometric series.

Step-by-step explanation:

To find the sum of the first 13 terms of the geometric sequence 2, 4, 8, 16, 32, ..., we use the formula for the sum of the first n terms of a geometric series, which is Sn = a(1 - rn)/(1 - r), where a is the first term and r is the common ratio.

In this series, the first term a is 2 and the common ratio r is also 2, since each term is twice the previous one. Substituting these values into the formula for n = 13 we get:

S13 = 2(1 - 213)/(1 - 2) = 2(1 - 8192)/(-1) = -2(-8191) = 16382.

Therefore, the sum of the first 13 terms is 16,382.

User FabiF
by
8.8k points

No related questions found