Problem #2: Referring to the same integral functional
I(u)
in the problem above, the associated Euler Lagrange equation can be written in the form
-h_(1)(x)u^('')(x)-h_(2)(x)u^(')(x)=(1-(h_(3)(x)u(x))^(2))h_(4)(x)u(x).
Find the function
h_(2)(x)
.