2.23 problem 24

Internal problem ID [7464]

Book: Second order enumerated odes
Section: section 2
Problem number: 24.
ODE order: 2.
ODE degree: 1.

CAS Maple gives this as type [[_2nd_order, _linear, _nonhomogeneous]]

\[ \boxed {x y^{\prime \prime }-y^{\prime }+4 y x^{3}=8 x^{3} \sin \left (x \right )^{2}} \]

Solution by Maple

Time used: 0.015 (sec). Leaf size: 124

dsolve(x*diff(y(x),x$2)-diff(y(x),x)+4*x^3*y(x)=8*x^3*sin(x)^2,y(x), singsol=all)
 

\[ y \left (x \right ) = \sin \left (x^{2}\right ) c_{2} +\cos \left (x^{2}\right ) c_{1} +1-\cos \left (2 x \right )-\frac {\sqrt {\pi }\, \sqrt {2}\, \operatorname {FresnelC}\left (\frac {\sqrt {2}\, \left (x -1\right )}{\sqrt {\pi }}\right ) \sin \left (x^{2}+1\right )}{2}+\frac {\sqrt {\pi }\, \sqrt {2}\, \operatorname {FresnelS}\left (\frac {\sqrt {2}\, \left (x -1\right )}{\sqrt {\pi }}\right ) \cos \left (x^{2}+1\right )}{2}+\frac {\sqrt {\pi }\, \sqrt {2}\, \operatorname {FresnelC}\left (\frac {\sqrt {2}\, \left (x +1\right )}{\sqrt {\pi }}\right ) \sin \left (x^{2}+1\right )}{2}-\frac {\sqrt {\pi }\, \sqrt {2}\, \operatorname {FresnelS}\left (\frac {\sqrt {2}\, \left (x +1\right )}{\sqrt {\pi }}\right ) \cos \left (x^{2}+1\right )}{2} \]

Solution by Mathematica

Time used: 1.041 (sec). Leaf size: 147

DSolve[x*y''[x]-y'[x]+4*x^3*y[x]==8*x^3*Sin[x]^2,y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to \frac {1}{2} \left (-\sqrt {2 \pi } \operatorname {FresnelC}\left (\sqrt {\frac {2}{\pi }} (x-1)\right ) \sin \left (x^2+1\right )+\sqrt {2 \pi } \operatorname {FresnelC}\left (\sqrt {\frac {2}{\pi }} (x+1)\right ) \sin \left (x^2+1\right )+\sqrt {2 \pi } \operatorname {FresnelS}\left (\sqrt {\frac {2}{\pi }} (x-1)\right ) \cos \left (x^2+1\right )-\sqrt {2 \pi } \operatorname {FresnelS}\left (\sqrt {\frac {2}{\pi }} (x+1)\right ) \cos \left (x^2+1\right )+2 c_1 \cos \left (x^2\right )+2 c_2 \sin \left (x^2\right )-2 \cos (2 x)+2\right ) \]