29.26.18 problem 754

Internal problem ID [5339]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 26
Problem number : 754
Date solved : Monday, January 27, 2025 at 11:15:51 AM
CAS classification : [[_homogeneous, `class G`]]

\begin{align*} {y^{\prime }}^{2}+a \,x^{2}+b y&=0 \end{align*}

Solution by Maple

dsolve(diff(y(x),x)^2+a*x^2+b*y(x) = 0,y(x), singsol=all)
 
\[ \text {No solution found} \]

Solution by Mathematica

Time used: 1.510 (sec). Leaf size: 581

DSolve[(D[y[x],x])^2+a x^2+b*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 
\begin{align*} \text {Solve}\left [\text {RootSum}\left [\text {$\#$1}^4-\text {$\#$1}^3 b+2 \text {$\#$1}^2 a+\text {$\#$1} a b+a^2\&,\frac {2 \text {$\#$1}^3 \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )-2 \text {$\#$1}^3 \log (x)-\text {$\#$1}^2 b \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+\text {$\#$1}^2 b \log (x)+2 \text {$\#$1} a \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+a b \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )-2 \text {$\#$1} a \log (x)-a b \log (x)}{4 \text {$\#$1}^3-3 \text {$\#$1}^2 b+4 \text {$\#$1} a+a b}\&\right ]-\log \left (\sqrt {-b y(x)} \sqrt {-a x^2-b y(x)}+b y(x)\right )+\frac {1}{2} \log (y(x))+2 \log (x)&=c_1,y(x)\right ] \\ \text {Solve}\left [\text {RootSum}\left [\text {$\#$1}^4+\text {$\#$1}^3 b+2 \text {$\#$1}^2 a-\text {$\#$1} a b+a^2\&,\frac {-2 \text {$\#$1}^3 \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+2 \text {$\#$1}^3 \log (x)-\text {$\#$1}^2 b \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+\text {$\#$1}^2 b \log (x)-2 \text {$\#$1} a \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+a b \log \left (\text {$\#$1} x-\sqrt {-a x^2-b y(x)}+\sqrt {-b y(x)}\right )+2 \text {$\#$1} a \log (x)-a b \log (x)}{-4 \text {$\#$1}^3-3 \text {$\#$1}^2 b-4 \text {$\#$1} a+a b}\&\right ]-\log \left (\sqrt {-b y(x)} \sqrt {-a x^2-b y(x)}+b y(x)\right )+\frac {1}{2} \log (y(x))+2 \log (x)&=c_1,y(x)\right ] \\ \end{align*}