Internal problem ID [2845]
Book: Ordinary differential equations and their solutions. By George Moseley Murphy.
1960
Section: Various 4
Problem number: 95.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_Bernoulli]
Solve \begin {gather*} \boxed {y^{\prime }-f \relax (x ) y-g \relax (x ) y^{k}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.036 (sec). Leaf size: 81
dsolve(diff(y(x),x) = f(x)*y(x)+g(x)*y(x)^k,y(x), singsol=all)
\[ y \relax (x ) = \left (\int \left (-k \,{\mathrm e}^{\int \left (f \relax (x ) k -f \relax (x )\right )d x} g \relax (x )+{\mathrm e}^{\int \left (f \relax (x ) k -f \relax (x )\right )d x} g \relax (x )\right )d x +c_{1}\right )^{-\frac {1}{k -1}} {\mathrm e}^{\frac {\left (\int f \relax (x )d x \right ) k}{k -1}} {\mathrm e}^{\int -\frac {f \relax (x )}{k -1}d x} \]
✓ Solution by Mathematica
Time used: 3.081 (sec). Leaf size: 67
DSolve[y'[x]==f[x] y[x]+g[x]y[x]^k,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to \left (\exp \left (-\left ((k-1) \int _1^xf(K[1])dK[1]\right )\right ) \left (-(k-1) \int _1^x\exp \left ((k-1) \int _1^{K[2]}f(K[1])dK[1]\right ) g(K[2])dK[2]+c_1\right )\right ){}^{\frac {1}{1-k}} \\ \end{align*}