[X] Suppose that 04(93) is a solution to the equation d2u du w + Maa + c(:1:)u = 0. d a) Use the substitution Mm) = a(3:)v(:r) to write down a first order equation for d: What method can you see to solve this equation? b) Verify that u(a:) = 3:3 is one solution to the differential equation d211, du 2 4 + =. 33 2 IL' 6% 0 Hence use the technique of (a) to nd the general solution