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  1. Top | #1

    Sep 2011
    430
    0.01
    56
    Thanked: 15

    .... + a=1+2+4+8+16+32
    ....+2a=2+4+8+16+32+64

    .....+2a+1=1+2+4+8+16+32

    2a+1=a
    a= -1
    :

  2. Top | #2

    Feb 2011
    2
    1.89
    07701766668 / 07800055259
    9,116
    Thanked: 7411

    Post

    .
    a




  3. Top | #3

    Jul 2011
    340
    0.04
    201
    Thanked: 42
    ..............3 ,2 ,1=a
    ...............2a= 2,,4,8

    ..................2a+1=3,5,7
    a=0

    ,.................2a+1= 1,3
    Ϳ



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