Arithmetic Sequence Sum

Find the sum of the arithmetic series described: 2 + (-2) + (-6) + (-10)..., S₁₀

• -160

• -328

• -320

• -336

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

• 550

• 638

• 610

• 288

Find S_n for the given series:

a₁=22

d=-8

n=21

• 1911

• -2346

• -1449

• -1218

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

• 495

• 395

• 80

• 90

• 8

• 5

• 3

• 1

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

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

• 1,600

• 18,235

• 18,475

• 19,125

If a₁ = 5, and a₁₀ = 68 , what is S₁₀?

• 360

• 363

• 362

• 365

if the sum of n terms of a arithmetic sequence is 5n^2 ext{ }+ ext{ }2n, then the first term is

• 7

• 10

• 3

• 25