El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$e^{2 x} \left(3 x + 1\right) = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{1}{3}$$
Solución numérica$$x_{1} = -20.7545280646502$$
$$x_{2} = -68.4509219575235$$
$$x_{3} = -96.424498039065$$
$$x_{4} = -84.4334923936465$$
$$x_{5} = -54.4757662820226$$
$$x_{6} = -34.5550917685433$$
$$x_{7} = -52.4805600031949$$
$$x_{8} = -92.4272165800833$$
$$x_{9} = -28.6079125858863$$
$$x_{10} = -64.4567892764897$$
$$x_{11} = -0.333333333333333$$
$$x_{12} = -66.4537573202272$$
$$x_{13} = -46.4978488851547$$
$$x_{14} = -98.4232276063852$$
$$x_{15} = -74.4434209092406$$
$$x_{16} = -60.4635310596924$$
$$x_{17} = -24.6637615129429$$
$$x_{18} = -42.5126199281745$$
$$x_{19} = -50.4857936875355$$
$$x_{20} = -22.7029568888083$$
$$x_{21} = -80.4371407123369$$
$$x_{22} = -32.5699030967642$$
$$x_{23} = -94.4258263467268$$
$$x_{24} = -102.420845857022$$
$$x_{25} = -16.9321251154776$$
$$x_{26} = -36.542303782468$$
$$x_{27} = -62.4600390543172$$
$$x_{28} = -26.6328914600022$$
$$x_{29} = -78.4391173978015$$
$$x_{30} = -48.4915310715936$$
$$x_{31} = -58.4672934960093$$
$$x_{32} = -70.4482646365338$$
$$x_{33} = -44.5048403571709$$
$$x_{34} = -108.417624106736$$
$$x_{35} = -90.4286731772725$$
$$x_{36} = -56.4713591346941$$
$$x_{37} = -110.416632934704$$
$$x_{38} = -86.4318054450131$$
$$x_{39} = -100.422011343995$$
$$x_{40} = -30.5872658791132$$
$$x_{41} = -72.4457690720829$$
$$x_{42} = -40.5213296861243$$
$$x_{43} = -106.418654992274$$
$$x_{44} = -88.4302010113599$$
$$x_{45} = -38.5311483140845$$
$$x_{46} = -104.419728028664$$
$$x_{47} = -18.8258345731506$$
$$x_{48} = -76.4412074451721$$
$$x_{49} = -82.4352683986099$$