34.6.17 problem 21

Internal problem ID [6091]
Book : A treatise on ordinary and partial differential equations by William Woolsey Johnson. 1913
Section : Chapter IX, Special forms of differential equations. Examples XVII. page 247
Problem number : 21
Date solved : Monday, January 27, 2025 at 01:35:36 PM
CAS classification : [[_Emden, _Fowler]]

\begin{align*} x y^{\prime \prime }+3 y^{\prime }+4 x^{3} y&=0 \end{align*}

✓ Solution by Maple

Time used: 0.005 (sec). Leaf size: 21

dsolve(x*diff(y(x),x$2)+3*diff(y(x),x)+4*x^3*y(x)=0,y(x), singsol=all)
 

\[ y = \frac {c_1 \sin \left (x^{2}\right )+c_2 \cos \left (x^{2}\right )}{x^{2}} \]

✓ Solution by Mathematica

Time used: 0.086 (sec). Leaf size: 41

DSolve[x*D[y[x],{x,2}]+3*D[y[x],x]+4*x^3*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to \frac {4 c_1 e^{-i x^2}-i c_2 e^{i x^2}}{4 x^2} \]