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  1. xXxiKillxXx's Avatar
    1 31-05-2012  00:34
    • Overlord in Training
    • Location: Trapped out in the Dunya
    Question..



    Why have they stopped at the x squared? (the question says complete up to x cubed)
  2. xXxiKillxXx's Avatar
    2 31-05-2012  00:51
    • Overlord in Training
    • Location: Trapped out in the Dunya
    Re: Question..
    (Original post by Muscovite)
    Maths is for virgins and child molesters
    lol
  3. raheem94's Avatar
    3 31-05-2012  00:52
    • TSR Demigod
    • Posts: 5,512
    Re: Question..
    (Original post by xXxiKillxXx)



    Why have they stopped at the x squared? (the question says complete up to x cubed)
    The third term in the expansion is \displaystyle \frac{(-1)(-2)(2x^2)^2}{2!} = 4x^4

    So the first three terms are: 1 -2x^2 + 4x^4 + \ldots , we need terms upto x^3 hence x^4 is not needed, so we write 1 - 2x^2 + \ldots
  4. xXxiKillxXx's Avatar
    4 31-05-2012  00:55
    • Overlord in Training
    • Location: Trapped out in the Dunya
    Re: Question..
    (Original post by raheem94)
    The third term in the expansion is \displaystyle \frac{(-1)(-2)(2x^2)^2}{2!} = 4x^4

    So the first three terms are: 1 -2x^2 + 4x^4 + \ldots , we need terms upto x^3 hence x^4 is not needed, so we write 1 - 2x^2 + \ldots
    Thanks a lot! that makes sense!
  5. Rosalind's Avatar
    5 03-06-2012  21:17
    • Full Member
    • Location: The green bit between Manchester and Sheffield
    • Posts: 88
    Re: Question..
    (Original post by Muscovite)
    Maths is for virgins and child molesters
    I love you
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