1.52 problem 52

Internal problem ID [8389]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 52.
ODE order: 1.
ODE degree: 1.

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

\[ \boxed {y^{\prime }-a y^{n}=b \,x^{\frac {n}{-n +1}}} \]

Solution by Maple

Time used: 0.141 (sec). Leaf size: 65

dsolve(diff(y(x),x) - a*y(x)^n - b*x^(n/(1-n))=0,y(x), singsol=all)
 

\[ x^{\frac {n}{n -1}} \left (\int _{\textit {\_b}}^{y \left (x \right )}\frac {1}{a \,\textit {\_a}^{n} \left (n -1\right ) x^{\frac {2 n -1}{n -1}}+x^{\frac {n}{n -1}} \textit {\_a} +b x \left (n -1\right )}d \textit {\_a} \right )-c_{1} = 0 \]

Solution by Mathematica

Time used: 0.32 (sec). Leaf size: 117

DSolve[y'[x] - a*y[x]^n - b*x^(n/(1-n))==0,y[x],x,IncludeSingularSolutions -> True]
                                                                                    
                                                                                    
 

\[ \text {Solve}\left [\int _1^{\left (\frac {a x^{-\frac {n}{1-n}}}{b}\right )^{\frac {1}{n}} y(x)}\frac {1}{K[1]^n-\left (\frac {(-1)^n b^{1-n} (n-1)^{-n}}{a}\right )^{\frac {1}{n}} K[1]+1}dK[1]=\int _1^xb K[2]^{\frac {n}{1-n}} \left (\frac {a K[2]^{-\frac {n}{1-n}}}{b}\right )^{\frac {1}{n}}dK[2]+c_1,y(x)\right ] \]