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-   -   How to find the general term of the series (https://www.askmehelpdesk.com/showthread.php?t=606146)

  • Oct 23, 2011, 06:26 AM
    endlesslove230
    How to find the general term of the series
    - the fist term
  • Oct 24, 2011, 12:17 AM
    Unknown008
    I think there is a mistake in the problem you typed...

    Is that:



    ?
  • Oct 24, 2011, 11:50 AM
    endlesslove230
    Oh, sorry, I should have paid more attention

  • Oct 24, 2011, 11:51 AM
    endlesslove230
    n+1 is meant to be subscript, but I don't know how to to write it.
  • Oct 24, 2011, 12:25 PM
    ebaines
    Your sequence goes like this:

    -1, -2, -5, -14, -41, -122...

    Here's an identity that can help you get started:



    For your problem set x = 3. This gives the sequence: 1, 4, 13, 40, 121, etc. Can you see how to modify this to get your sequence?

    And to get subscripts in LaTex: enclose the item in squiggly brackets if it's more than one character. Same trick applies to superscripts too. Hence use C_{n+1} = 3C_n +1

    to produce:


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