Arithmetic Sequence Find Common Difference

Find a₂₆ in the arithmetic sequence: -15, -35, -55, -75, ...

• -515

• -535

• -490

• 460

Which term of the arithmetic sequence 4,1, -2 -5, … is -32?

• 10th

• 11th

• 12th

• 13th

How many terms are in an arithmetic sequence whose first term is -3,common difference is 2, and last term is 23?

• 9

• 12

• 14

• 23

-2,2,6…, 8th term

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

• 225

• 450

• 384

• 224

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

• 1296

• 1298

• 2604

• 649

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

• 1911

• -1449

• -2436

• -1218

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

• 19

• 83

• 893

• 624

Which is the recursive definition formula for an arithmetic sequence?

• a_n=a₁ + (n-1)d

• a_n = a_n-1d

• a₁ = c, a_n = a_n-1 + d

7, 14, 21, 28, ...

• d = 7

• d = 5

• d = 6

• d = 9