Find the First and Third Partial Sums, S1 and S3 $$a _ { n } = ( - 2 ) ^ { n }$$

Multiple Choice

Find the first and third partial sums, s1 and s3, for the sequence
- $$a _ { n } = ( - 2 ) ^ { n }$$

A) -2, -6
B) -2, 2
C) -2, -8
D) -2, -14