El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{\log{\left(e^{x} x + 1 \right)}}{\log{\left(x + \sqrt{x^{2} + 1} \right)}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución numérica$$x_{1} = -43.3994514654678$$
$$x_{2} = -33.7002291278265$$
$$x_{3} = -45.7597410257952$$
$$x_{4} = -84$$
$$x_{5} = -51.2941476996224$$
$$x_{6} = -68$$
$$x_{7} = -90$$
$$x_{8} = -46.53087513762$$
$$x_{9} = -38.3836333251876$$
$$x_{10} = -45.3713261043746$$
$$x_{11} = -45.3682799020102$$
$$x_{12} = -98$$
$$x_{13} = -37.0441473368719$$
$$x_{14} = -44.5884552810949$$
$$x_{15} = -40.1081793647041$$
$$x_{16} = -48.8029498623465$$
$$x_{17} = -37.4956282276754$$
$$x_{18} = -32.6632900979411$$
$$x_{19} = -39.2537917748258$$
$$x_{20} = -35.1786456692558$$
$$x_{21} = -387.445030565266$$
$$x_{22} = -34.6946355029704$$
$$x_{23} = -35.6549717870873$$
$$x_{24} = -47.2948294456441$$
$$x_{25} = -65.2185316851804$$
$$x_{26} = -92$$
$$x_{27} = -42.592245598174$$
$$x_{28} = -39.4760749477738$$
$$x_{29} = -86$$
$$x_{30} = -67.485973353229$$
$$x_{31} = -49.3161717843167$$
$$x_{32} = -42.1855534362529$$
$$x_{33} = -100$$
$$x_{34} = -36.1242900447651$$
$$x_{35} = -59.2246697567999$$
$$x_{36} = -33.1877436645797$$
$$x_{37} = -41.3638095051796$$
$$x_{38} = -76$$
$$x_{39} = -42.9963140722135$$
$$x_{40} = -68.0275704279569$$
$$x_{41} = -47.3407233500386$$
$$x_{42} = -48.4282673214477$$
$$x_{43} = -37.5240176245332$$
$$x_{44} = -78$$
$$x_{45} = -31.7343085974711$$
$$x_{46} = -48.0520533355827$$
$$x_{47} = -34.2021456592464$$
$$x_{48} = -57.2397727579464$$
$$x_{49} = -41.4350316533908$$
$$x_{50} = -67.528274142588$$
$$x_{51} = -39.6828434480538$$
$$x_{52} = -36.5871809504796$$
$$x_{53} = -30.4023040253644$$
$$x_{54} = -63.1970847942379$$
$$x_{55} = -30.9980586467113$$
$$x_{56} = -392.30577478002$$
$$x_{57} = -82$$
$$x_{58} = -38.820803308266$$
$$x_{59} = -33.6495469060591$$
$$x_{60} = -31.5710171171308$$
$$x_{61} = -88$$
$$x_{62} = -393.262799640241$$
$$x_{63} = -29.7781851770083$$
$$x_{64} = -41.7761179000335$$
$$x_{65} = -32.1251230266095$$
$$x_{66} = -46.9137204075844$$
$$x_{67} = -72$$
$$x_{68} = -40.5299999850927$$
$$x_{69} = -46.146235748999$$
$$x_{70} = -55.2562382064487$$
$$x_{71} = -66.8449972607667$$
$$x_{72} = -74$$
$$x_{73} = -61.2124560959278$$
$$x_{74} = -35.5808727505208$$
$$x_{75} = -391.113901380411$$
$$x_{76} = -67.3375706608183$$
$$x_{77} = -37.9420096728669$$
$$x_{78} = -53.2742716967352$$
$$x_{79} = -393.431988661188$$
$$x_{80} = -43.3978697635907$$
$$x_{81} = -43.7970156806803$$
$$x_{82} = -47.6742561836685$$
$$x_{83} = -387.356894030113$$
$$x_{84} = -29.8411235040176$$
$$x_{85} = -44.9809219917996$$
$$x_{86} = -44.1938477072055$$
$$x_{87} = -40.9484877961702$$
$$x_{88} = -70$$
$$x_{89} = -96$$
$$x_{90} = -80$$
$$x_{91} = -94$$