Find the first and third partial sums, s1 and s3, for the sequence
-$$a _ { n } = 3 ^ { n } - 6$$
A)-3, 33
B)-3, 9
C)-3, 21
D)-3, 0

Name: Find the first and third partial sums, s1 and s3, for the sequence -\[a _ { n } = 3 ^ { n } - 6\] A)-3, 33 B)-3, 9 C)-3, 21 D)-3, 0
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Question

Quizplus · Accepted Answer

The first partial sum is s1 = a1 = 3^1 - 6 = -3. The third partial sum is s3 = a1 + a2 + a3 = 3^1 - 6 + 3^2 - 6 + 3^3 - 6 = 21.

Find the First and Third Partial Sums, S1 and S3 an=3n−6a _ { n } = 3 ^ { n } - 6an​=3n−6

Find the First and Third Partial Sums, S1 and S3 $a _ { n } = 3 ^ { n } - 6$