Summation Question

  • Thread starter missusa
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  • #1
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write out the following sum and compute where possible

[tex]\sum 3[/tex] x =0 (x2 + 2x + 2)

is that clear???
 

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  • #2
malawi_glenn
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do you mean

[tex] \sum _{n = .3}(x^2+2x+2) = ?[/tex]

when [tex]x=0[/tex]

??

Now where is the index [itex]n[/itex] in the expression to be summed over?

And where is your attempt to solution?
 
  • #3
CompuChip
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Malawi that doesn't make much sense either.
Missusa, if you can't write proper LaTeX, it's better to do it completely without. For example, write
"Sum from n = 1 to infinity of (e^(-n / 3) / n^2)"
 
  • #4
Integral
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Maybe OP means:

[tex] \sum^3 _{x= 0}(x^2+2x+2) [/tex]
 
  • #5
HallsofIvy
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write out the following sum and compute where possible

[tex]\sum 3[/tex] x =0 (x2 + 2x + 2)

is that clear???
Maybe OP means:

[tex] \sum^3 _{x= 0}(x^2+2x+2) [/tex]
Is Integral right about what you mean? Then the sum, from x= 0 to 3 means you replace the "x" in x2+ 2x+ 2 by 0, then by 1, then by 2, then by 3, and add:
(02+ 3(0)+ 2)+ (12+ 2(1)+ 2)+ (22+ 2(2)+ 2)+ (32+ 2(3)+ 2)
 
  • #6
Astronuc
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Maybe OP means:

[tex] \sum^3 _{x= 0}(x^2+2x+2) [/tex]
That's about the only way I see it making sense. Same as if the limits of summation were n = 0, 3 and x = n, an integer.
 
  • #7
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Thank you so much you two are very smart...I do appreciate your help. That is what I meant but I could not write it the way it was.

Thanks again,
 
  • #8
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Can I get some information about Endogenous Moeny: honrizontalism and structuralism??
 
  • #9
Dick
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Can I get some information about Endogenous Moeny: honrizontalism and structuralism??
Definitely not. Especially if you are talking about Levi-Strauss anthropological structuralism with gratuitous misspellings.
 
  • #10
Astronuc
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Can I get some information about Endogenous Moeny: honrizontalism and structuralism??
That would be better suited in another thread, either in other sciences or in the economic forums.

Ostensibly, such a disussion is found in one's macroeconomic textbook, or one can search on Google with the keywords. Nevertheless -

http://www.trincoll.edu/~setterfi/Horizontalism,%20Structuralism%20and%20Historical%20Time.pdf [Broken]

Complexity, Endogenous Money and Macroeconomic Theory By Mark Setterfield

http://cas.umkc.edu/econ/economics/faculty/Fontana/Winter 2005/ROPE.pdf
 
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  • #11
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Thank You!
 

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