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Can somebody guide me in getting solution for the following

non-linear differential equation?

u''=K/((a-u)^2) .....K is a constant

Where u is a function of x and the boundary conditions are

u(0)=0

u(L)=0

I need solution in form of 'u' as a function of 'x' with two constants, which are to be determined from the boundary conditions.

Thanks

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# Nonlinear Equation

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