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anonymous

  • one year ago

I will medal/fan.. NO DIRECT ANSWERS Identify the type of sequence shown in the table below and select the appropriate response. n f(n) 1 540 2 500 3 460 4 420 5 380 Arithmetic sequence; common difference is −40 Arithmetic sequence; common difference is 40 Geometric sequence; common ratio is −40 Geometric sequence; common ratio is 40

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  1. anonymous
    • one year ago
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    @DanJS

  2. DanJS
    • one year ago
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    Do you know what each of those sequences look like?

  3. anonymous
    • one year ago
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    somewhat?! @DanJS

  4. anonymous
    • one year ago
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    yes.. okay! @DanJS @Hero

  5. DanJS
    • one year ago
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    Test if it follows each by using a couple of the points

  6. anonymous
    • one year ago
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    I am ust not good with the arithmatic stuff like what?

  7. DanJS
    • one year ago
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    If it increases the same amount for each increase in n, it is arithmetic

  8. DanJS
    • one year ago
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    or decreases

  9. anonymous
    • one year ago
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    so Its geometric, I am assuming?

  10. DanJS
    • one year ago
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    a geometric sequence will have the ratio of any two consecutive terms as a constant same value

  11. DanJS
    • one year ago
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    http://www.differencebetween.com/difference-between-arithmetic-sequence-and-vs-geometric-sequence/

  12. anonymous
    • one year ago
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    so the answer is c or d, not a or b.

  13. DanJS
    • one year ago
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    looks like it is decreasing by 40 for every increase in n

  14. DanJS
    • one year ago
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    arithmetic, common difference in sucessive terms

  15. anonymous
    • one year ago
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    okay. so I mean a or b.. I was reading it wrong

  16. anonymous
    • one year ago
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    so the common difference is -40?

  17. DanJS
    • one year ago
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    yes, you see you are taking the previous term and adding (-40) to it every time

  18. DanJS
    • one year ago
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    an = a(n-1) - 40

  19. anonymous
    • one year ago
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    Can you help with another?

  20. DanJS
    • one year ago
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    If it were geometric, you can test out the ratio to see, by \[\frac{ a _{n+1} }{ a _{n} } = r\]

  21. DanJS
    • one year ago
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    the ratio will be a value for geometric, not the difference

  22. anonymous
    • one year ago
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    What is the exact value for the expression the square root of 56. − the square root of 14. + the square root of 126.? Simplify if possible. the square root of 14. 4 the square root of 14. 2 the square root of 42. 8 the square root of 42.

  23. anonymous
    • one year ago
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    sorry dinners ready... Maybe later, if ur on you could help? ::)

  24. anonymous
    • one year ago
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    @DanJS I think that the answer is B?

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