El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$e^{x - 9} \left(x - 10\right) = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 10$$
Solución numérica$$x_{1} = -109.06914228288$$
$$x_{2} = -103.080930865701$$
$$x_{3} = -115.05861571791$$
$$x_{4} = -49.3262172000187$$
$$x_{5} = -63.2198969347223$$
$$x_{6} = -99.0896081322168$$
$$x_{7} = -67.1981473783759$$
$$x_{8} = -39.4541901054407$$
$$x_{9} = -22.0913241206348$$
$$x_{10} = -83.1329980618501$$
$$x_{11} = -75.1619388762717$$
$$x_{12} = -55.2735421114241$$
$$x_{13} = -113.06199711462$$
$$x_{14} = -79.146704685936$$
$$x_{15} = -87.1205993527235$$
$$x_{16} = -69.1882678183563$$
$$x_{17} = -111.065503606275$$
$$x_{18} = -91.1093292372273$$
$$x_{19} = -73.1702113647074$$
$$x_{20} = -71.1789726997072$$
$$x_{21} = 10$$
$$x_{22} = -93.1040701575302$$
$$x_{23} = -47.3470343910748$$
$$x_{24} = -101.085180982879$$
$$x_{25} = -77.1541152286569$$
$$x_{26} = -121.049158430263$$
$$x_{27} = -33.5740005056864$$
$$x_{28} = -45.369883839131$$
$$x_{29} = -97.0942236453165$$
$$x_{30} = -65.2086687051389$$
$$x_{31} = -59.2447823410302$$
$$x_{32} = -31.6261544568938$$
$$x_{33} = -29.6870583075465$$
$$x_{34} = -61.2319064024203$$
$$x_{35} = -35.5287883412543$$
$$x_{36} = -117.055352825341$$
$$x_{37} = -43.3950840173982$$
$$x_{38} = -95.0990398451986$$
$$x_{39} = -89.1148331129772$$
$$x_{40} = -107.072920781941$$
$$x_{41} = -119.052202302045$$
$$x_{42} = -53.2896724119287$$
$$x_{43} = -57.2586229734047$$
$$x_{44} = -105.076847342498$$
$$x_{45} = -23.9540517145623$$
$$x_{46} = -81.1396752246407$$
$$x_{47} = -37.4891864944529$$
$$x_{48} = -27.7592416454249$$
$$x_{49} = -51.3071694941258$$
$$x_{50} = -25.8463765939876$$
$$x_{51} = -85.1266472537626$$
$$x_{52} = -41.4230249783974$$