Question 25 (4 points) The differential equation xy" + 4y' - 2y + Axy = 0, when placed in the Sturm-Liouville form p(x)y- q(x)y+ Ar(x)y = 0, has the weight function r (x) = Ob) x O c) None of these O d) 2 5 Oe) 1