Question

1. Find the sum of the first 12 terms of the sequence. Show all work for full credit.

1, -4, -9, -14, . . .



2. Find the sum of the arithmetic sequence.
-4, -1, 2, 5, 8, 11, 14

answers:
42

35

-28

17

3.Find the sum of the geometric sequence.
1, 1/4, 1/16, 1/64, 1/256
answers:

341

1/192

1/768

341/256

Answer 1

1: -5 each time. 1,-4,-9,-14,-19,-24,-29,-34,-39,-44,-49,-54
2: +3 each time. -4, -1, 2, 5, 8, 11, 14, [17]
3. Is multiplying by 4 each time for the denominator. So its 1/768