22.7 problem 712

Internal problem ID [15456]

Book: A book of problems in ordinary differential equations. M.L. KRASNOV, A.L. KISELYOV, G.I. MARKARENKO. MIR, MOSCOW. 1983
Section: Chapter 2 (Higher order ODE’s). Section 17. Boundary value problems. Exercises page 163
Problem number: 712.
ODE order: 2.
ODE degree: 1.

CAS Maple gives this as type [[_2nd_order, _missing_x]]

\[ \boxed {y^{\prime \prime }-y=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 0, y^{\prime }\left (1\right ) = 1] \end {align*}

Solution by Maple

Time used: 0.047 (sec). Leaf size: 23

dsolve([diff(y(x),x$2)-y(x)=0,y(0) = 0, D(y)(1) = 1],y(x), singsol=all)
 

\[ y \left (x \right ) = \frac {{\mathrm e}^{1-x} \left ({\mathrm e}^{2 x}-1\right )}{{\mathrm e}^{2}+1} \]

Solution by Mathematica

Time used: 0.014 (sec). Leaf size: 27

DSolve[{y''[x]-y[x]==0,{y[0]==0,y'[1]==1}},y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to \frac {e^{1-x} \left (e^{2 x}-1\right )}{1+e^2} \]