Arithmetic Sequence

• A series of numbers changes with the same difference

• Look for words, "arithmetic sequence" or "constant difference" in the question

Arithmetic Sequence: series of numbers with a constant difference (d)

• d = aₙ – aₙ₋₁

• aₙ = a₁ + (n – 1) * d

EXAMPLES

Given the sequence, what is the difference?

1,3,5 => difference = 2

2,5,8 => difference = 3