... problemy+ 5y+ 6y = 0; y(0) = 1, y(0) = V. For what values of V does y(t) remain nonnegative for all t > 0? 952 34 5 6 -1010203040 50 Figure 17.2: The solution of y− 2y+ 5y = 0, ... b,xξ−a1 + a lnxξ,xξ−aξ lnxξif a2= b.94312 34 5 -30- 25 -20- 15 -10 -5 Figure 17.1: The solution of 6y− 5y+ y = 0, y(0) = 4, y(0) = 0.The general solution of the ... −i, φ = ı(2n + 1/2)π, and c = i, φ = ı(2n − 1/2)π, for n ∈ Z.Solution 17.9We substitute y =eλtinto the differential equation.λ2eλt +5 eλt +6 eλt= 0λ2+ 5 + 6 = 0(λ + 2)(λ + 3)...