3.15 problem 19

Internal problem ID [530]

Book: Elementary differential equations and boundary value problems, 10th ed., Boyce and DiPrima
Section: Section 2.4. Page 76
Problem number: 19.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_Bernoulli]

\[ \boxed {y^{\prime }+y \left (3-y t \right )=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 20

dsolve(diff(y(t),t) = -y(t)*(3-t*y(t)),y(t), singsol=all)
 

\[ y \left (t \right ) = \frac {9}{1+9 c_{1} {\mathrm e}^{3 t}+3 t} \]

Solution by Mathematica

Time used: 0.126 (sec). Leaf size: 28

DSolve[y'[t] == -y[t]*(3-t*y[t]),y[t],t,IncludeSingularSolutions -> True]
 

\begin{align*} y(t)\to \frac {9}{3 t+9 c_1 e^{3 t}+1} y(t)\to 0 \end{align*}