3.15 problem 15

Internal problem ID [6150]

Book: Elementary differential equations. Rainville, Bedient, Bedient. Prentice Hall. NJ. 8th edition. 1997.
Section: CHAPTER 17. Power series solutions. 17.5. Solutions Near an Ordinary Point. Exercises page 355
Problem number: 15.
ODE order: 2.
ODE degree: 1.

CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]

Solve \begin {gather*} \boxed {\left (2 x^{2}+1\right ) y^{\prime \prime }+3 x y^{\prime }-3 y=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).

Solution by Maple

Time used: 0.0 (sec). Leaf size: 29

Order:=8; 
dsolve((1+2*x^2)*diff(y(x),x$2)+3*x*diff(y(x),x)-3*y(x)=0,y(x),type='series',x=0);
 

\[ y \relax (x ) = \left (1+\frac {3}{2} x^{2}-\frac {7}{8} x^{4}+\frac {77}{80} x^{6}\right ) y \relax (0)+D\relax (y )\relax (0) x +O\left (x^{8}\right ) \]

Solution by Mathematica

Time used: 0.002 (sec). Leaf size: 34

AsymptoticDSolveValue[(1+2*x^2)*y''[x]+3*x*y'[x]-3*y[x]==0,y[x],{x,0,7}]
 

\[ y(x)\to c_1 \left (\frac {77 x^6}{80}-\frac {7 x^4}{8}+\frac {3 x^2}{2}+1\right )+c_2 x \]