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2 answers:
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Let a₁ = the first term.
Because each previous term is 1/5 of the value of the current term, the geometric sequence is
a₁, 5a₁, 25a₁, ...,
The common ratio is r = 5.
The n-th term is
The fifth term is 781.25. Therefore
a₁*5⁴ = 781.25
625a₁ = 781.25
a₁ = 1.25
Answer:
The recursive formula is
Because each previous term is 1/5 of the value of the current term, the geometric sequence is
a₁, 5a₁, 25a₁, ...,
The common ratio is r = 5.
The n-th term is
The fifth term is 781.25. Therefore
a₁*5⁴ = 781.25
625a₁ = 781.25
a₁ = 1.25
Answer:
The recursive formula is