The fifth term of a geometric sequence is 781.25. Each term of the sequence is 1/5 of the value of the following term. Which recursive formula represents the situation?
a) aₙ=5aₙ₋₁; a₁=488.28125
b) aₙ=5aₙ₋₁; a₁=1.25
c) aₙ=1/5aₙ₋₁; a₁=1.25
d) aₙ=1/5aₙ₋₁; a₁=488.28125
