4.55 problem 55

Internal problem ID [14213]

Book: INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton. Fourth edition 2014. ElScAe. 2014
Section: Chapter 2. First Order Equations. Exercises 2.2, page 39
Problem number: 55.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime }-{\mathrm e}^{2 x -y}=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 1] \end {align*}

Solution by Maple

Time used: 0.078 (sec). Leaf size: 20

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

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

Solution by Mathematica

Time used: 0.785 (sec). Leaf size: 20

DSolve[{y'[x]==Exp[2*x-y[x]],{y[0]==1}},y[x],x,IncludeSingularSolutions -> True]
 

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