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## Homework Statement

Need to linearize the poisson-boltzmann equation to be used later in the problem. I simply have never linearized an equation and searching google didn't really help me understand.

## Homework Equations

http://img215.imageshack.us/img215/2149/eqnq.jpg [Broken]

## The Attempt at a Solution

Just need an idea of how to go about this in order to complete the question.

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