El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$2^{x} x^{3} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = -109.672236005325$$
$$x_{2} = -65.3435174909136$$
$$x_{3} = -117.547019769671$$
$$x_{4} = -86.2382568689517$$
$$x_{5} = 0$$
$$x_{6} = -103.782331028979$$
$$x_{7} = -123.466085176903$$
$$x_{8} = -74.7215678877385$$
$$x_{9} = -113.606884378955$$
$$x_{10} = -125.441195116795$$
$$x_{11} = -99.8652380068859$$
$$x_{12} = -70.9380581130249$$
$$x_{13} = -107.707211632962$$
$$x_{14} = -90.1157658418881$$
$$x_{15} = -59.8926280857726$$
$$x_{16} = -115.576310451019$$
$$x_{17} = -67.1955195548266$$
$$x_{18} = -78.5368800541949$$
$$x_{19} = -111.638828064544$$
$$x_{20} = -131.371985642923$$
$$x_{21} = -121.491977161746$$
$$x_{22} = -105.743868399823$$
$$x_{23} = -84.30554008362$$
$$x_{24} = -69.0609603360786$$
$$x_{25} = -129.39419631059$$
$$x_{26} = -82.377400564907$$
$$x_{27} = -61.6890438307113$$
$$x_{28} = -94.0070890825653$$
$$x_{29} = -97.9100023307089$$
$$x_{30} = -58.1221693911743$$
$$x_{31} = -119.51893298121$$
$$x_{32} = -127.417249796093$$
$$x_{33} = -72.8253380710796$$
$$x_{34} = -101.822736957202$$
$$x_{35} = -80.4543267588133$$
$$x_{36} = -88.1751238367849$$
$$x_{37} = -63.5071295407446$$
$$x_{38} = -92.0598519539103$$
$$x_{39} = -76.6257091303517$$
$$x_{40} = -95.9572166827786$$