Question

1. Find the 21st term in the arithmetic sequence 9, 3, –3, ... (1 point)
–111
–129
–117
–126
2. Find the sum of the first 20 terms in the arithmetic series –6 – 12 – 18 – .... (1 point)
–2,520
–1,266
–1,140
–1,260
3. Find the 10th term in the geometric sequence –2, 6, –18, .... (1 point)
118,098
–118,098
39,366
–39,366
4. Find the sum of the first eight terms in the geometric series –4 + 8 – 16 + .... (1 point)
–342
–1,020
–340
340