El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\left(x + 1\right) e^{- 2 x} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -1$$
Solución numérica$$x_{1} = 24.9472162397279$$
$$x_{2} = 90.7367428641377$$
$$x_{3} = 38.8322789111555$$
$$x_{4} = 106.727075306218$$
$$x_{5} = 108.726077101889$$
$$x_{6} = 52.7858695601634$$
$$x_{7} = 80.744867564022$$
$$x_{8} = 64.7635580514383$$
$$x_{9} = 68.7580004944523$$
$$x_{10} = 54.7813963486339$$
$$x_{11} = 110.725116752175$$
$$x_{12} = 48.7960575646516$$
$$x_{13} = 44.8083248519552$$
$$x_{14} = 46.8018932907923$$
$$x_{15} = 98.7314953027256$$
$$x_{16} = 84.7413721608517$$
$$x_{17} = 86.7397532581931$$
$$x_{18} = 19.0748429547998$$
$$x_{19} = 22.9793660972884$$
$$x_{20} = 36.8423192425575$$
$$x_{21} = 62.7666276312008$$
$$x_{22} = 76.7487545895484$$
$$x_{23} = 88.7382119783469$$
$$x_{24} = -1.00000000000002$$
$$x_{25} = 28.8999794563979$$
$$x_{26} = 92.7353409586734$$
$$x_{27} = 42.8154488929449$$
$$x_{28} = -1$$
$$x_{29} = 58.7734577077894$$
$$x_{30} = 102.729194605611$$
$$x_{31} = 60.7699191705335$$
$$x_{32} = 32.8668630155044$$
$$x_{33} = 50.7907382716567$$
$$x_{34} = 100.730320853278$$
$$x_{35} = 66.7606886725095$$
$$x_{36} = 15.2664071699171$$
$$x_{37} = 74.750866150933$$
$$x_{38} = 21.0204168645089$$
$$x_{39} = 78.7467581174956$$
$$x_{40} = 40.8233842784938$$
$$x_{41} = 82.7430747086043$$
$$x_{42} = 70.7554768515962$$
$$x_{43} = 72.7531030642314$$
$$x_{44} = 96.7327211186562$$
$$x_{45} = 17.1509341395474$$
$$x_{46} = 34.8537438173178$$
$$x_{47} = 30.8820886141341$$
$$x_{48} = 94.7340017492518$$
$$x_{49} = 104.72811364994$$
$$x_{50} = 56.7772722047327$$
$$x_{51} = 26.9213146551643$$