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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
Sagot :
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