El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{e^{\frac{\left(-1\right) x}{\frac{7}{5}}} \sqrt{\frac{x}{\frac{7}{5}}}}{\frac{7}{5}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = 66.0166762374375$$
$$x_{2} = 60.0797583122846$$
$$x_{3} = 71.9682775252652$$
$$x_{4} = 54.1657925306415$$
$$x_{5} = 0$$
$$x_{6} = 111.806313729627$$
$$x_{7} = 83.8986667255825$$
$$x_{8} = 58.1053131213106$$
$$x_{9} = 75.9417775078922$$
$$x_{10} = 103.826502502499$$
$$x_{11} = 77.9298930325448$$
$$x_{12} = 127.774784026098$$
$$x_{13} = 101.83215523406$$
$$x_{14} = 81.9084096264958$$
$$x_{15} = 40.5975837652553$$
$$x_{16} = 62.0566942185301$$
$$x_{17} = 89.872745394403$$
$$x_{18} = 129.771477963922$$
$$x_{19} = 117.793303292552$$
$$x_{20} = 125.778212786483$$
$$x_{21} = 107.815956464715$$
$$x_{22} = 119.789308021652$$
$$x_{23} = 69.9831156137745$$
$$x_{24} = 67.9991930448701$$
$$x_{25} = 48.2912219095089$$
$$x_{26} = 73.954538094846$$
$$x_{27} = 85.8895085533586$$
$$x_{28} = 113.801795354422$$
$$x_{29} = 50.2433875322883$$
$$x_{30} = 42.4954900891343$$
$$x_{31} = 52.2020037263418$$
$$x_{32} = 105.821108757123$$
$$x_{33} = 91.8650540536322$$
$$x_{34} = 109.81102965092$$
$$x_{35} = 64.0357636701058$$
$$x_{36} = 95.8508704117777$$
$$x_{37} = 87.8808833596682$$
$$x_{38} = 121.785466940361$$
$$x_{39} = 97.8443167935326$$
$$x_{40} = 115.797462288818$$
$$x_{41} = 79.9187960385172$$
$$x_{42} = 93.8577731688329$$
$$x_{43} = 56.1338036297182$$
$$x_{44} = 46.3472764217413$$
$$x_{45} = 44.4140919403245$$
$$x_{46} = 99.8380862405197$$
$$x_{47} = 123.781771243295$$