El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\log{\left(e^{x} x + 1 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = -68.3902062873328$$
$$x_{2} = -84$$
$$x_{3} = -51.4230249902084$$
$$x_{4} = -35.8463657800623$$
$$x_{5} = -49.4541900943659$$
$$x_{6} = -32.0909021548071$$
$$x_{7} = -39.6870580531337$$
$$x_{8} = -65.2745896870724$$
$$x_{9} = 0$$
$$x_{10} = -88$$
$$x_{11} = -80$$
$$x_{12} = -66.8514041634729$$
$$x_{13} = -59.3260592560949$$
$$x_{14} = -63.2846768535693$$
$$x_{15} = -86$$
$$x_{16} = -43.5740005000142$$
$$x_{17} = -66.9406028058353$$
$$x_{18} = -66.7759095836843$$
$$x_{19} = -96$$
$$x_{20} = -55.3698896441125$$
$$x_{21} = -82$$
$$x_{22} = -45.5287883402443$$
$$x_{23} = -72$$
$$x_{24} = -76$$
$$x_{25} = -74$$
$$x_{26} = -57.3470368283057$$
$$x_{27} = -70$$
$$x_{28} = -67.0722137834037$$
$$x_{29} = -67.5277777777778$$
$$x_{30} = -61.3054048101071$$
$$x_{31} = -47.4891864918913$$
$$x_{32} = -67.1711270535139$$
$$x_{33} = -67.6748451523506$$
$$x_{34} = -98$$
$$x_{35} = -37.7592399735773$$
$$x_{36} = -68$$
$$x_{37} = -53.3950832416529$$
$$x_{38} = -41.6261544186546$$
$$x_{39} = -78$$
$$x_{40} = -67.2178743179732$$
$$x_{41} = -100$$
$$x_{42} = -33.9539832026336$$
$$x_{43} = -92$$
$$x_{44} = -94$$
$$x_{45} = -66.6456548044949$$
$$x_{46} = -90$$