4.49 problem 49

Internal problem ID [14207]

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: 49.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_quadrature]

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

Solution by Maple

Time used: 0.062 (sec). Leaf size: 12

dsolve([diff(y(x),x)=y(x)/ln(y(x)),y(0) = exp(1)],y(x), singsol=all)
 

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

Solution by Mathematica

Time used: 0.01 (sec). Leaf size: 16

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

\[ y(x)\to e^{\sqrt {2 x+1}} \]