Question

Write a recursive formula and an explicit formula for the following arithmetic sequence.

61, 58, 55, 52, 49,...
a1=
an=

Answer 1

Explicit: a₁=61 aₙ=a₁ -3ₓ(n-1)

Recursive: a₁=61 aₙ=aₙ₋₁ - 3

Explanation:

Explicit: a₁=61 aₙ=a₁ -3ₓ(n-1)

Recursive: a₁=61 aₙ=aₙ₋₁ - 3