Internal problem ID [9413]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 2, linear second order
Problem number: 1078.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
\[ \boxed {y^{\prime \prime }+f \left (x \right ) y^{\prime }+\left (\frac {f \left (x \right )^{2}}{4}+\frac {f^{\prime }\left (x \right )}{2}+a \right ) y=0} \]
✓ Solution by Maple
Time used: 0.015 (sec). Leaf size: 39
dsolve(diff(diff(y(x),x),x)+f(x)*diff(y(x),x)+(1/4*f(x)^2+1/2*diff(f(x),x)+a)*y(x)=0,y(x), singsol=all)
\[ y \left (x \right ) = c_{1} {\mathrm e}^{-\frac {\left (\int f \left (x \right )d x \right )}{2}} \sinh \left (x \sqrt {-a}\right )+c_{2} {\mathrm e}^{-\frac {\left (\int f \left (x \right )d x \right )}{2}} \cosh \left (x \sqrt {-a}\right ) \]
✓ Solution by Mathematica
Time used: 0.124 (sec). Leaf size: 69
DSolve[y[x]*(a + f[x]^2/4 + Derivative[1][f][x]/2) + f[x]*y'[x] + y''[x] == 0,y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to \frac {\left (2 \sqrt {a} c_1-i c_2 e^{2 i \sqrt {a} x}\right ) \exp \left (-\frac {1}{2} \int _1^xf(K[1])dK[1]-i \sqrt {a} x\right )}{2 \sqrt {a}} \]