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Math Help - infinity condition on 2nd order diff

  1. #1
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    infinity condition on 2nd order diff

    so if I have

    y"+y'-2y = 0

    with y-> as x-> infinity, y(0)= 2

    would I proceed here when it comes to the condition?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by dankelly07 View Post
    so if I have

    y"+y'-2y = 0

    with y-> as x-> infinity, y(0)= 2

    would I proceed here when it comes to the condition?
    i think you're missing something, y -> what as x -> infinity?
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  3. #3
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    Oops yeah ,

    with y-> 0 as x-> +infinity, y(0)= 2
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  4. #4
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    Quote Originally Posted by dankelly07 View Post
    Oops yeah ,

    with y-> 0 as x-> +infinity, y(0)= 2
    The general solution is y(x)=Ae^x+Be^{-2x} (I hope you know why).

    If y \to 0 as x \to \infty, A=0

    and you should be able to finish from there.

    RonL
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