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differential equation


Dear MathGroup,

I would also like to ask a question at this time also.  I am trying to solve
the following differential equation, but am not sure how to go about it.

E''(z) + E'(z)*H*(1/ra - 1/z) + E(z)*(2*H/z^2 - B) = 2*H/z^3 * Integral z to
L, E(t) dt.

Where H, B and ra are all constants.

I can supply the actual derivation of the equation in pdf form to anyone
that is interested.

The equation is used to solve attenuation along a pipeline.

Best regards

Andrew



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