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Thread: Quick Simple homogenous equation help

  1. May 4th 2010, 11:51 AM #1
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    Quick Simple homogenous equation help

    If i have the function:

    \frac{d^2u}{dx^2} + 4u = f(x)

    What would the homogenous equation be?
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  2. May 4th 2010, 05:04 PM #2
    dwsmith
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    Quote Originally Posted by signature View Post
    If i have the function:

    \frac{d^2u}{dx^2} + 4u = f(x)

    What would the homogenous equation be?

    \frac{d^2u}{dx^2} + 4u = 0
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  3. May 6th 2010, 08:35 PM #3
    matheagle
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    so U(x)=a\sin(2x)+b\cos(2x) for all a,b.
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