El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$2^{3 x} x = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = -34.1386337778936$$
$$x_{2} = -60.0547927061242$$
$$x_{3} = -104.014477327489$$
$$x_{4} = -28.1867062635471$$
$$x_{5} = -96.0188735198087$$
$$x_{6} = -108.012537834471$$
$$x_{7} = -78.0323382121221$$
$$x_{8} = -92.0213783732371$$
$$x_{9} = -50.0752338444871$$
$$x_{10} = -100.016581880987$$
$$x_{11} = -16.4754917995057$$
$$x_{12} = -94.0200974757181$$
$$x_{13} = -20.3187986158818$$
$$x_{14} = -44.0926946679446$$
$$x_{15} = -76.0342620644328$$
$$x_{16} = -56.061984172019$$
$$x_{17} = -88.0241276787635$$
$$x_{18} = -82.0287945382915$$
$$x_{19} = -80.0305184480586$$
$$x_{20} = -40.1077899127274$$
$$x_{21} = -24.2372708772864$$
$$x_{22} = -26.2093567468384$$
$$x_{23} = -72.0384599787285$$
$$x_{24} = -38.1167688487649$$
$$x_{25} = -14.6300440829942$$
$$x_{26} = -58.0582496850334$$
$$x_{27} = -102.015507681281$$
$$x_{28} = -62.0515833500955$$
$$x_{29} = -64.048595882143$$
$$x_{30} = -30.1679431807401$$
$$x_{31} = -84.0271590959135$$
$$x_{32} = -46.0862883161954$$
$$x_{33} = -22.2725811001753$$
$$x_{34} = -86.0256054747641$$
$$x_{35} = -42.0998190038229$$
$$x_{36} = -48.0804962383253$$
$$x_{37} = -110.011624030558$$
$$x_{38} = -74.036299211153$$
$$x_{39} = -18.3822048549826$$
$$x_{40} = -52.0704314401568$$
$$x_{41} = 0$$
$$x_{42} = -36.1269614291348$$
$$x_{43} = -106.013488187136$$
$$x_{44} = -98.0177027883301$$
$$x_{45} = -68.0432003741514$$
$$x_{46} = -90.0227202842562$$
$$x_{47} = -66.0458080202876$$
$$x_{48} = -70.0407559899189$$
$$x_{49} = -54.0660310769623$$
$$x_{50} = -32.1521367828296$$