Sum of Arithmetic Sequences

Find the sum of the arithmetic series described:

2 + (-2) + (-6) + (-10)..., S₁₀

• -160

• -320

• -328

• -336

The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Find the sum of the 11 terms.

• 550

• 610

• 638

• 288

Find S_n for the given series:

a₁=22

d=-8

n=21

• 1911

• -2346

• -1449

• -1218

Find the sum of the first 100 odd numbers

• 5000

• 2525

• 2500

• 3250

The S₁₁ of a sequence where the first term is 10 and the common difference is 7.

• 495

• 395

• 80

• 90

Determine the sum of the first 10 terms of the sequence 2, 5, 8, ...

• 310

• 155

• 170

• 50

The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Find the sum of the 11 terms.

• 550

• 638

• 610

• 288

Find the sum of first 12 terms of the following sequence:

5, 8, 11, ...

What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47 + ...?

• 1,600
• 18,235
• 18,475
• 19,125

Find the sum of the first 13 terms of :

2, 6, 10, 14, ….