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Find no. of terms

  1. Jul 23, 2012 #1
    find no. of terms....

    The problem statement, all variables and given/known data
    find n
    212,179,146,113,....................

    3. The attempt at a solution
    here a=212 d=-33 but nth term or the sum is not given.any help will be appreciated thanks
     
  2. jcsd
  3. Jul 23, 2012 #2

    Curious3141

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    Re: find no. of terms....



    The problem statement is not complete. Are they asking you to find the nth term of the arithmetic progression, or its sum to n terms? Or something else?
     
  4. Jul 23, 2012 #3

    Mentallic

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    Re: find no. of terms....

    If it's asking to find the number of terms, then it could possibly mean to find the number of terms that are positive? Because clearly this sequence can go on forever.
     
  5. Jul 23, 2012 #4
    Re: find no. of terms....

    the question demands the no. of terms only..it seems impossible to solve...:/
     
  6. Jul 23, 2012 #5
    Re: find no. of terms....

    Did you copy this question verbatim from what a teacher said/wrote on the board or do you actually have the physical question in front of you?
     
  7. Jul 23, 2012 #6
    Re: find no. of terms....

    Well you could have found the general term :

    Tn = a+(n-1)d

    but n is not given !

    Now your limit isn't specified ! This arithmetic progression can go on forever. However we know that its sum will be less than 0.

    But its unending ! So if seriously this is your question then answer will be that number of terms are infinite.
     
  8. Jul 23, 2012 #7
    Re: find no. of terms....

    the question above is as stated as in my book..
     
  9. Jul 23, 2012 #8

    eumyang

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    Re: find no. of terms....

    I'm guessing that the book is not written in English. Is it possible that something got lost in the translation?
     
  10. Jul 23, 2012 #9
    Re: find no. of terms....

    it might be but during printing not translation.the book is in english...!
     
  11. Jul 24, 2012 #10

    eumyang

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    Re: find no. of terms....

    What is the title of the book, then? Where is the problem in the book?
     
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