El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{2 x + 6}{x^{4}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -3$$
Solución numérica$$x_{1} = 25933.5071018464$$
$$x_{2} = -33426.6824739142$$
$$x_{3} = -29190.6487165975$$
$$x_{4} = 37795.4563623864$$
$$x_{5} = 22545.1944369019$$
$$x_{6} = -21567.9168937669$$
$$x_{7} = 25086.378726993$$
$$x_{8} = -3$$
$$x_{9} = 15771.0411782051$$
$$x_{10} = -18181.7251284673$$
$$x_{11} = 39490.2333626434$$
$$x_{12} = -34273.9511254653$$
$$x_{13} = 42032.4617709506$$
$$x_{14} = 36948.0821052848$$
$$x_{15} = 31016.7973498408$$
$$x_{16} = -42747.3982826414$$
$$x_{17} = 36100.7181982889$$
$$x_{18} = 33558.6960717304$$
$$x_{19} = 28475.0533780127$$
$$x_{20} = -39357.8795522768$$
$$x_{21} = -36815.8540471195$$
$$x_{22} = 12386.4052983632$$
$$x_{23} = 38642.840315012$$
$$x_{24} = 30169.5303273475$$
$$x_{25} = 13232.3153399113$$
$$x_{26} = 23392.2189819465$$
$$x_{27} = -13107.1283687159$$
$$x_{28} = -24108.3972035662$$
$$x_{29} = -12262.3913266923$$
$$x_{30} = -22414.6802500837$$
$$x_{31} = -28343.5176113305$$
$$x_{32} = 17464.1326540489$$
$$x_{33} = -23261.5095056236$$
$$x_{34} = 35253.3653562682$$
$$x_{35} = -41052.6196144354$$
$$x_{36} = 29322.2818143256$$
$$x_{37} = -25802.3233313027$$
$$x_{38} = 31864.081473576$$
$$x_{39} = -26649.3515472863$$
$$x_{40} = 16617.5375085277$$
$$x_{41} = 21698.212156716$$
$$x_{42} = 34406.0243614854$$
$$x_{43} = -20721.2282189646$$
$$x_{44} = -13952.2608994261$$
$$x_{45} = -31732.2018432107$$
$$x_{46} = -17335.4624419828$$
$$x_{47} = -30884.9931472439$$
$$x_{48} = -41900.0044273885$$
$$x_{49} = -19028.1186107856$$
$$x_{50} = -19874.6246417798$$
$$x_{51} = -35968.538108466$$
$$x_{52} = -15643.4245741437$$
$$x_{53} = -30037.8080461813$$
$$x_{54} = 27627.8467677543$$
$$x_{55} = -37663.1835429278$$
$$x_{56} = -16489.3529710976$$
$$x_{57} = 32711.381429663$$
$$x_{58} = 20004.3943406738$$
$$x_{59} = 24239.2816242933$$
$$x_{60} = 14078.4093662485$$
$$x_{61} = 19157.570822569$$
$$x_{62} = 40337.6349533559$$
$$x_{63} = -35121.2367559644$$
$$x_{64} = -14797.7123050696$$
$$x_{65} = 26780.6639422503$$
$$x_{66} = -24955.3369715297$$
$$x_{67} = 14924.6589339392$$
$$x_{68} = -40205.2444396118$$
$$x_{69} = 41185.0445790013$$
$$x_{70} = -32579.4321959345$$
$$x_{71} = 18310.8139539694$$
$$x_{72} = 20851.2769400128$$
$$x_{73} = -27496.4175047585$$
$$x_{74} = -38510.5256614696$$