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    (Original post by sweetstars)
    Thank you very much!
    You should, however, write down the actual terms since that's what the question is asking for and not just the n values.
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    (Original post by brainmaster)
    yes thanks for that.
    however we could also use nth term - (n+1)th term = 32
    but u get n as -15 and we know n can never be a negative hence u ignore the negative.
    That hardly seems a sensible way to proceed and certainly not a method that would generalize.
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    (Original post by RichE)
    That hardly seems a sensible way to proceed and certainly not a method that would generalize.
    obviously this argument will only be valid for such cases since we know that one Part of the equation is being multiplied by -1 so the value of n will also be negative. I learnt this when I was dealing with a question on geometric sequence which said the difference between the third term and fifth term is ... And I came up with the equation 5th term - 3rd term = ... And solved for my unknown but I got a negative answer....when u see the marking scheme they do it the other way round but they had my method as an alternative.
    however don't u think such questions or cases we should find the absolute or modulus of the solution to avoid arrows like in this case we find for | n |?
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    (Original post by RDKGames)
    You should, however, write down the actual terms since that's what the question is asking for and not just the n values.
    So 272 and 240? Thanks once again!!
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    (Original post by sweetstars)
    So 272 and 240? Thanks once again!!
    Yes.
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    (Original post by brainmaster)
    obviously this argument will only be valid for such cases since we know that one Part of the equation is being multiplied by -1 so the value of n will also be negative. I learnt this when I was dealing with a question on geometric sequence which said the difference between the third term and fifth term is ... And I came up with the equation 5th term - 3rd term = ... And solved for my unknown but I got a negative answer....when u see the marking scheme they do it the other way round but they had my method as an alternative.
    however don't u think such questions or cases we should find the absolute or modulus of the solution to avoid arrows like in this case we find for | n |?
    "avoid arrows"? I'm afraid I have no idea what you're asking
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    (Original post by RichE)
    "avoid arrows"? I'm afraid I have no idea what you're asking
    errors*
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