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    ferna007's Avatar
    ferna007 Posts: 1, Reputation: 1
    New Member
     
    #1

    Jan 25, 2010, 02:48 AM
    Sequence and series
    1.three numbers are in AP and their sum is 15. If 8,6,4 are added to them respectively,they form a GP.The numbers are.
    Please tell me the solution and method of solving this type of questions using this formula for Ap:(a-d),a, (a+d) and for GP:a/r,a,ar
    The option for the above question is :A)2,6,7 B)4,6,5 C) 3,5,7

    The above is question of AP and GP.
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
     
    #2

    Jan 25, 2010, 03:04 AM
    Thank you for taking the time to copy your homework to AMHD.
    Please refer to this announcement: https://www.askmehelpdesk.com/financ...-b-u-font.html
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Jan 25, 2010, 08:00 AM

    Formula for the nth term of an AP:



    The sum of n terms in an AP is:


    Those fot a GP;






    Post what you did.

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