Fig. 8From: Novel approach for solving higher-order differential equations with applications to the Van der Pol and Van der Pol–Duffing equationsResponse of forced Van der Pol–Duffing oscillator with ε = − \(\mu = 2, F = 1\), \(\omega = 0.7\), \(x\left( {t_{0} } \right) = 0.1\) and \(\dot{x}\left( {t_{0} } \right) = - 0.2\)Back to article page