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anonymous

  • one year ago

Which of the following is the formula for the geometric sequence? 320, 80, 20, 5,... an = 4(320)n-1 an = 320(4)n-1 an = 320(1/4)n-1

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  1. anonymous
    • one year ago
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    The last equation. The number before the ratio is the first term which dumbs the answers down to the last two. n is the position of a term. Try the position of one of them in the last two equations and see which one works. Or, you could just find the rate which is multiplying by 1/4. There is one answer for that.

  2. SolomonZelman
    • one year ago
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    what common ratio between the terms do you see here?

  3. SolomonZelman
    • one year ago
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    Or, do you notice any pattern in this sequence of numbers?

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