anonymous
  • anonymous
Shanna writes the formula f(x + 1) = 2.5f(x) when f(1) = 2 to represent this sequence: 2, 5, 12.5, 31.25, … Which error did Shanna make?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
A) She used the incorrect common ratio. B) She used the incorrect initial value. C) She should have multiplied by f(x) rather then have it as an exponent. D) She treated the sequence as geometric instead of arithmetic.
Owlcoffee
  • Owlcoffee
Well, you'll have to determine the common ratio the same way, divide the second by the first, and if it does not give 2,5 as a result, she used the wrong common ratio.
anonymous
  • anonymous
what do you think @shaylaLuv ?

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anonymous
  • anonymous
B.
anonymous
  • anonymous
I think shanna did nothing wrong
anonymous
  • anonymous
\(f(x + 1) = 2.5f(x)\), \(f(1) = 2\), let \(x=1\)\[f(2)=2.5f(1)=2.5 \times 2=5\]and let \(x=2\)\[f(3)=2.5f(2)=2.5 \times5=12.5\]let \(x=3\)\[f(4)=2.5f(3)=2.5 \times 12.5=31.25\]

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