El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{\left(-1\right) e^{- 2 \left(x + 2\right)}}{2} \left(x + 2\right) = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -2$$
Solución numérica$$x_{1} = 110.724650105804$$
$$x_{2} = 76.7477425643428$$
$$x_{3} = 20.9985568426417$$
$$x_{4} = 58.7716558547915$$
$$x_{5} = 106.726571333614$$
$$x_{6} = 108.725592331161$$
$$x_{7} = 96.7321015813734$$
$$x_{8} = 13.3512835816058$$
$$x_{9} = 19.045566517455$$
$$x_{10} = 26.9101563450688$$
$$x_{11} = 84.740552644349$$
$$x_{12} = 80.743959404134$$
$$x_{13} = 15.2019322374056$$
$$x_{14} = 36.8371423706663$$
$$x_{15} = 102.728648638889$$
$$x_{16} = 98.7309018612766$$
$$x_{17} = 92.7346637830271$$
$$x_{18} = 88.7374687213724$$
$$x_{19} = 78.7458001354877$$
$$x_{20} = 66.7593230252746$$
$$x_{21} = 90.7360338021631$$
$$x_{22} = 60.7682441747585$$
$$x_{23} = 28.8906584686652$$
$$x_{24} = 54.7792932548714$$
$$x_{25} = 100.729751891747$$
$$x_{26} = 46.7989062666094$$
$$x_{27} = 38.8277010740674$$
$$x_{28} = -2$$
$$x_{29} = 30.8741817192005$$
$$x_{30} = 64.7620995836363$$
$$x_{31} = 94.733354354677$$
$$x_{32} = 86.7389732689306$$
$$x_{33} = 56.7753284772699$$
$$x_{34} = 72.7519682501478$$
$$x_{35} = 48.7933377610053$$
$$x_{36} = 62.7650665265292$$
$$x_{37} = 74.7497953700779$$
$$x_{38} = 68.7567190665171$$
$$x_{39} = 70.7542720741067$$
$$x_{40} = 82.7422125786474$$
$$x_{41} = 17.1094084394257$$
$$x_{42} = 44.8050290067642$$
$$x_{43} = 50.7882512606652$$
$$x_{44} = 40.8193067000071$$
$$x_{45} = 22.9623739768123$$
$$x_{46} = 52.7835866004374$$
$$x_{47} = 34.8478410712821$$
$$x_{48} = 42.8117934734258$$
$$x_{49} = 24.9336061561789$$
$$x_{50} = 32.8600686649078$$
$$x_{51} = 104.727589310741$$