El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\left(- x - 1\right) e^{x} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -1$$
Solución numérica$$x_{1} = -49.4711655449634$$
$$x_{2} = -57.3581866464466$$
$$x_{3} = -99.1176822742156$$
$$x_{4} = -95.1297833837852$$
$$x_{5} = -35.8971886855811$$
$$x_{6} = -81.1835505142898$$
$$x_{7} = -51.4381699084522$$
$$x_{8} = -61.316486753355$$
$$x_{9} = -87.157973273941$$
$$x_{10} = -32.1756177264239$$
$$x_{11} = -67.2659399232894$$
$$x_{12} = -34.0182140925185$$
$$x_{13} = -69.2515753571383$$
$$x_{14} = -55.3821676071309$$
$$x_{15} = -39.7215440170094$$
$$x_{16} = -77.2033239479075$$
$$x_{17} = -101.112049515773$$
$$x_{18} = -37.8006485741225$$
$$x_{19} = -115.078868899778$$
$$x_{20} = -119.071013554438$$
$$x_{21} = -53.4086841814429$$
$$x_{22} = -89.1503604017549$$
$$x_{23} = -75.2141900449367$$
$$x_{24} = -113.08303446753$$
$$x_{25} = -65.2814467335924$$
$$x_{26} = -83.1745282419576$$
$$x_{27} = -1$$
$$x_{28} = -43.5991101904548$$
$$x_{29} = -111.087371742331$$
$$x_{30} = -109.091891597578$$
$$x_{31} = -59.336389337426$$
$$x_{32} = -41.6553752443623$$
$$x_{33} = -79.1931311289629$$
$$x_{34} = -47.5083552648416$$
$$x_{35} = -97.1235868161767$$
$$x_{36} = -73.2257989645248$$
$$x_{37} = -63.2982393476586$$
$$x_{38} = -91.1431441899768$$
$$x_{39} = -85.1660166222937$$
$$x_{40} = -45.550618994199$$
$$x_{41} = -107.096605847552$$
$$x_{42} = -103.106670133692$$
$$x_{43} = -105.101527351786$$
$$x_{44} = -117.074865014488$$
$$x_{45} = -93.1362942896831$$
$$x_{46} = -71.2382302560517$$
$$x_{47} = -121.06730595755$$