anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@DanJS
DanJS
  • DanJS
Do you know what each of those sequences look like?
anonymous
  • anonymous
somewhat?! @DanJS

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anonymous
  • anonymous
yes.. okay! @DanJS @Hero
DanJS
  • DanJS
Test if it follows each by using a couple of the points
anonymous
  • anonymous
I am ust not good with the arithmatic stuff like what?
DanJS
  • DanJS
If it increases the same amount for each increase in n, it is arithmetic
DanJS
  • DanJS
or decreases
anonymous
  • anonymous
so Its geometric, I am assuming?
DanJS
  • DanJS
a geometric sequence will have the ratio of any two consecutive terms as a constant same value
DanJS
  • DanJS
http://www.differencebetween.com/difference-between-arithmetic-sequence-and-vs-geometric-sequence/
anonymous
  • anonymous
so the answer is c or d, not a or b.
DanJS
  • DanJS
looks like it is decreasing by 40 for every increase in n
DanJS
  • DanJS
arithmetic, common difference in sucessive terms
anonymous
  • anonymous
okay. so I mean a or b.. I was reading it wrong
anonymous
  • anonymous
so the common difference is -40?
DanJS
  • DanJS
yes, you see you are taking the previous term and adding (-40) to it every time
DanJS
  • DanJS
an = a(n-1) - 40
anonymous
  • anonymous
Can you help with another?
DanJS
  • DanJS
If it were geometric, you can test out the ratio to see, by \[\frac{ a _{n+1} }{ a _{n} } = r\]
DanJS
  • DanJS
the ratio will be a value for geometric, not the difference
anonymous
  • anonymous
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.
anonymous
  • anonymous
sorry dinners ready... Maybe later, if ur on you could help? ::)
anonymous
  • anonymous
@DanJS I think that the answer is B?

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