Arithmetic Series

Find S₁₄ 
7, 2, -3, ...

• -812
• 119
• -945
• -357

The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Evaluate the related series. 

• 550
• 638
• 610
• 288

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911
• -1449
• -2436
• -1218

Find the sum 
24+48+72+...+480

• 5280
• 9576
• 10080
• 5040

Find the missing terms of the arithmetic sequence:
145, ___, ___, ___, 205

• 160, 175, 190
• 165, 185, 195
• 155, 165, 175
• 190, 175, 160

Find how many terms are in the series below:
7+13+19+25...=1044

• 16
• 17
• 18
• 19