El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$3^{x} x = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = -105.171158304958$$
$$x_{2} = -39.6254287506401$$
$$x_{3} = -101.179447462537$$
$$x_{4} = -111.159976271481$$
$$x_{5} = -53.4050531471438$$
$$x_{6} = -93.198473257723$$
$$x_{7} = -43.5414114397842$$
$$x_{8} = -91.2038299641473$$
$$x_{9} = -55.385530685981$$
$$x_{10} = -77.2505363225033$$
$$x_{11} = -89.2094642193927$$
$$x_{12} = -47.4772732671719$$
$$x_{13} = -69.287522054867$$
$$x_{14} = -31.9104759351313$$
$$x_{15} = -83.2282672262855$$
$$x_{16} = -81.2352603347398$$
$$x_{17} = -87.2153982580997$$
$$x_{18} = -65.3102111808443$$
$$x_{19} = -49.4505421027084$$
$$x_{20} = -45.5073361732256$$
$$x_{21} = -63.3228960049139$$
$$x_{22} = -107.167274596856$$
$$x_{23} = -37.6781436701552$$
$$x_{24} = -41.5803840500915$$
$$x_{25} = -28.1910379196607$$
$$x_{26} = -79.2426704800528$$
$$x_{27} = -67.2984527302786$$
$$x_{28} = -73.2678153634158$$
$$x_{29} = -103.175212107713$$
$$x_{30} = -59.3515251017883$$
$$x_{31} = -115.153242753328$$
$$x_{32} = -109.163550472496$$
$$x_{33} = -95.1933740183726$$
$$x_{34} = -97.1885140620293$$
$$x_{35} = -85.2216567655223$$
$$x_{36} = -33.8165589494197$$
$$x_{37} = -57.3677643839735$$
$$x_{38} = -71.2773341579085$$
$$x_{39} = -119.14701079529$$
$$x_{40} = -30.0305613589326$$
$$x_{41} = -51.426609895199$$
$$x_{42} = -99.1838768826625$$
$$x_{43} = -75.2589014817435$$
$$x_{44} = -117.150067655572$$
$$x_{45} = -35.7407684061747$$
$$x_{46} = 0$$
$$x_{47} = -61.3366222633619$$
$$x_{48} = -113.156543099422$$