1.23 problem 26

Internal problem ID [12567]

Book: DIFFERENTIAL EQUATIONS by Paul Blanchard, Robert L. Devaney, Glen R. Hall. 4th edition. Brooks/Cole. Boston, USA. 2012
Section: Chapter 1. First-Order Differential Equations. Exercises section 1.2. page 33
Problem number: 26.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime }-y t=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 3] \end {align*}

Solution by Maple

Time used: 0.015 (sec). Leaf size: 12

dsolve([diff(y(t),t)=t*y(t),y(0) = 3],y(t), singsol=all)
 

\[ y \left (t \right ) = 3 \,{\mathrm e}^{\frac {t^{2}}{2}} \]

Solution by Mathematica

Time used: 0.04 (sec). Leaf size: 16

DSolve[{y'[t]==t*y[t],{y[0]==3}},y[t],t,IncludeSingularSolutions -> True]
 

\[ y(t)\to 3 e^{\frac {t^2}{2}} \]