El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{x^{4}}{e^{x}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = 116.02075104835$$
$$x_{2} = 66.8569921245111$$
$$x_{3} = 82.4517982577909$$
$$x_{4} = 47.972396360433$$
$$x_{5} = 44.4039722855805$$
$$x_{6} = 61.084838084679$$
$$x_{7} = 57.2747449075389$$
$$x_{8} = 74.6264908386027$$
$$x_{9} = 63.0022841352056$$
$$x_{10} = 68.7927248589347$$
$$x_{11} = 46.1724670727619$$
$$x_{12} = 78.5335190727288$$
$$x_{13} = 59.1752620727982$$
$$x_{14} = 94.256841035927$$
$$x_{15} = 53.5069870587241$$
$$x_{16} = 118.004329640053$$
$$x_{17} = 112.055642623119$$
$$x_{18} = 119.988538699805$$
$$x_{19} = 114.037841461369$$
$$x_{20} = 76.5784579732318$$
$$x_{21} = 49.797674137975$$
$$x_{22} = 0$$
$$x_{23} = 121.973342595893$$
$$x_{24} = 100.180213261041$$
$$x_{25} = 64.9266117639408$$
$$x_{26} = 55.3847297818114$$
$$x_{27} = 86.3794004430773$$
$$x_{28} = 98.2045123429924$$
$$x_{29} = 92.2850666999783$$
$$x_{30} = 90.3148149316341$$
$$x_{31} = 108.093562295815$$
$$x_{32} = 102.157042175857$$
$$x_{33} = 42.6751925918041$$
$$x_{34} = 58.9215034340449$$
$$x_{35} = 80.4913841059288$$
$$x_{36} = 72.6779492381579$$
$$x_{37} = 96.2300238919975$$
$$x_{38} = 84.4145367308178$$
$$x_{39} = 104.134922290665$$
$$x_{40} = 51.6437140044003$$
$$x_{41} = 106.113783629493$$
$$x_{42} = 88.3462124470094$$
$$x_{43} = 70.7332140201021$$
$$x_{44} = 110.074199825913$$