Sum of Series

Find the sum of the 1st 100 terms: 100+98+96+......

• 100

• 1000

• 50

• -98

Find the sum: 11 + 15 + 19 + .......+ 83

• 19

• 83

• 893

• 624

Find the sum: 50 + 33 + 16 + ..... -18

• 162

• 9

• -150

• -162

Find the sum of the 1st 20 terms of 3 +11 +19+ .......

• 1080

• 1580

• 155

• 1550

Evaluate the arithmetic series described:
2 + (-2) + (-6) + (-10)..., S₁₀

• -160

• -328

• -320

• -336

Evaluate the arithmetic series described:
11 + 18 + 25 + 32..., S₇

• 225

• 450

• 384

• 224

Evaluate the arithmetic series described:
28 + 38 + 48 + 58..., S₇

• 1644

• 812

• 406

• 3290

Evaluate the arithmetic series described:
14 + 23 + 32 + 41..., S₁₁

• 1296

• 1298

• 2604

• 649

Evaluate the arithmetic series described:
0 - 7 - 14 - 21..., S₁₇

• -959

• -1904

• -952

• -1918

Evaluate the arithmetic series described:
1 + 3 + 5 + 7..., S₈

• 116

• 58

• 64

• 128