30.30 problem 890

Internal problem ID [4126]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 30
Problem number: 890.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [[_homogeneous, `class G`]]

\[ \boxed {16 x {y^{\prime }}^{2}+8 y y^{\prime }+y^{6}=0} \]

Solution by Maple

Time used: 0.125 (sec). Leaf size: 103

dsolve(16*x*diff(y(x),x)^2+8*y(x)*diff(y(x),x)+y(x)^6 = 0,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = \frac {1}{x^{\frac {1}{4}}} y \left (x \right ) = -\frac {1}{x^{\frac {1}{4}}} y \left (x \right ) = -\frac {i}{x^{\frac {1}{4}}} y \left (x \right ) = \frac {i}{x^{\frac {1}{4}}} y \left (x \right ) = 0 y \left (x \right ) = \frac {\operatorname {RootOf}\left (-\ln \left (x \right )+c_{1} +4 \left (\int _{}^{\textit {\_Z}}\frac {1}{\textit {\_a} \sqrt {-\textit {\_a}^{4}+1}}d \textit {\_a} \right )\right )}{x^{\frac {1}{4}}} y \left (x \right ) = \frac {\operatorname {RootOf}\left (-\ln \left (x \right )+c_{1} -4 \left (\int _{}^{\textit {\_Z}}\frac {1}{\textit {\_a} \sqrt {-\textit {\_a}^{4}+1}}d \textit {\_a} \right )\right )}{x^{\frac {1}{4}}} \end{align*}

Solution by Mathematica

Time used: 0.705 (sec). Leaf size: 171

DSolve[16 x(y'[x])^2+8 y[x] y'[x]+y[x]^6==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to -\frac {\sqrt {2} e^{\frac {c_1}{4}}}{\sqrt {x+e^{c_1}}} y(x)\to -\frac {i \sqrt {2} e^{\frac {c_1}{4}}}{\sqrt {x+e^{c_1}}} y(x)\to \frac {i \sqrt {2} e^{\frac {c_1}{4}}}{\sqrt {x+e^{c_1}}} y(x)\to \frac {\sqrt {2} e^{\frac {c_1}{4}}}{\sqrt {x+e^{c_1}}} y(x)\to 0 y(x)\to -\frac {1}{\sqrt [4]{x}} y(x)\to -\frac {i}{\sqrt [4]{x}} y(x)\to \frac {i}{\sqrt [4]{x}} y(x)\to \frac {1}{\sqrt [4]{x}} \end{align*}