Arithmetic Sequences and Series Review

-21, -16, -11, -6, ...

Is this sequence arithmetic, geometric, or neither?

• arithmetic (common difference d = 5)

• geometric (common ratio r = 5)

• neither

Find the 22nd term of the following sequence:
5, 8, 11, ...

• 14

• 68

• 63

• 71

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

• 1,600

• 18,235

• 18,475

• 19,125

Describe the sequence, find the 5th term, and write the rule

• geometric, a₅ = 2, a_n = 2n - 10

• geometric, a₅ = 0, a_n = -10n + 2

• arithmetic, a₅ = 2, a_n = -10n + 2

• arithmetic, a₅ = 0, a_n = 2n - 10

• 315

• 330

• 345

• 360

• 8

• 5

• 3

• 1

Find the common difference:  a₂ = 6 and a₆ = -14

• -1

• -5

• -2

• 2

• 635.5

• 625

• 625.5

• 637.5

• 12, 42, 72, 102, 132

• 9, 41, 73, 105, 137

• 9, 39, 69, 99, 129

• 11, 41, 71, 101, 131

• 413, 613, 813, 1013, 1213

• 13, 213, 413, 613, 813

• 411, 611, 811, 1011, 1211

• 213, 413, 613, 813, 1013