El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\left(x - 1\right)^{3} e^{- x} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 1$$
Solución numérica$$x_{1} = 90.0329966733037$$
$$x_{2} = 121.775930505841$$
$$x_{3} = 54.8443340978913$$
$$x_{4} = 86.0816973543389$$
$$x_{5} = 43.6297358015102$$
$$x_{6} = 103.897488575925$$
$$x_{7} = 95.9691013757468$$
$$x_{8} = 60.6158047412707$$
$$x_{9} = 41.8414116510858$$
$$x_{10} = 45.45001464031$$
$$x_{11} = 88.0566684492275$$
$$x_{12} = 97.9498855961256$$
$$x_{13} = 119.787357087122$$
$$x_{14} = 105.881577922607$$
$$x_{15} = 38.4046035504832$$
$$x_{16} = 84.1082038676741$$
$$x_{17} = 66.4428111345717$$
$$x_{18} = 40.0948446556097$$
$$x_{19} = 92.0105743292411$$
$$x_{20} = 109.851790527999$$
$$x_{21} = 74.2682938598491$$
$$x_{22} = 52.9377975873454$$
$$x_{23} = 99.9315866885268$$
$$x_{24} = 113.824437607585$$
$$x_{25} = 82.1363232109235$$
$$x_{26} = 47.2953636216014$$
$$x_{27} = 111.837828823653$$
$$x_{28} = 78.1980294566398$$
$$x_{29} = 50.7891811400224$$
$$x_{30} = 1.00011980065604$$
$$x_{31} = 68.3941058337526$$
$$x_{32} = 115.811582576$$
$$x_{33} = 80.1662076833005$$
$$x_{34} = 93.9893048461644$$
$$x_{35} = 51.0425430626385$$
$$x_{36} = 70.3490384341384$$
$$x_{37} = 58.6846067336514$$
$$x_{38} = 64.4956162771777$$
$$x_{39} = 117.799232124447$$
$$x_{40} = 62.5530655072635$$
$$x_{41} = 101.914140458126$$
$$x_{42} = 56.7604042076047$$
$$x_{43} = 49.1607831270781$$
$$x_{44} = 107.866360018691$$
$$x_{45} = 72.3072142242164$$
$$x_{46} = 76.2319839406924$$