Internal problem ID [1107]
Book: Elementary differential equations with boundary value problems. William F. Trench.
Brooks/Cole 2001
Section: Chapter 5 linear second order equations. Section 5.6 Reduction or order. Page
253
Problem number: 1.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
\[ \boxed {\left (1+2 x \right ) y^{\prime \prime }-2 y^{\prime }-\left (2 x +3\right ) y=\left (1+2 x \right )^{2}} \] Given that one solution of the ode is \begin {align*} y_1 &= {\mathrm e}^{-x} \end {align*}
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 20
dsolve([(2*x+1)*diff(y(x),x$2)-2*diff(y(x),x)-(2*x+3)*y(x)=(2*x+1)^2,exp(-x)],singsol=all)
\[ y \left (x \right ) = {\mathrm e}^{-x} c_{2} +x \,{\mathrm e}^{x} c_{1} +1-2 x \]
✓ Solution by Mathematica
Time used: 0.126 (sec). Leaf size: 33
DSolve[(2*x+1)*y''[x]-2*y'[x]-(2*x+3)*y[x]==(2*x+1)^2,y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to c_1 e^{-x-\frac {1}{2}}+x \left (-2+c_2 e^{x+\frac {1}{2}}\right )+1 \]