Para hallar los extremos hay que resolver la ecuación
$$\frac{d}{d x} f{\left(x \right)} = 0$$
(la derivada es igual a cero),
y las raíces de esta ecuación serán los extremos de esta función:
$$\frac{d}{d x} f{\left(x \right)} = $$
primera derivada$$e^{x} + \cos{\left(x \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -64.4026493985908$$
$$x_{2} = -20.4203522496875$$
$$x_{3} = -58.1194640914112$$
$$x_{4} = -48.6946861306418$$
$$x_{5} = -7.85436968657411$$
$$x_{6} = -86.3937979737193$$
$$x_{7} = -1.74613953040801$$
$$x_{8} = -36.1283155162826$$
$$x_{9} = -98.9601685880785$$
$$x_{10} = -92.6769832808989$$
$$x_{11} = -39.2699081698724$$
$$x_{12} = -14.1371676661008$$
$$x_{13} = -23.5619449018649$$
$$x_{14} = -26.7035375555158$$
$$x_{15} = -29.8451302091029$$
$$x_{16} = -70.6858347057703$$
$$x_{17} = -10.9955575115013$$
$$x_{18} = -67.5442420521806$$
$$x_{19} = -89.5353906273091$$
$$x_{20} = -54.9778714378214$$
$$x_{21} = -42.4115008234622$$
$$x_{22} = -51.8362787842316$$
$$x_{23} = -17.278759563416$$
$$x_{24} = -32.9867228626928$$
$$x_{25} = -80.1106126665397$$
$$x_{26} = -73.8274273593601$$
$$x_{27} = -76.9690200129499$$
$$x_{28} = -83.2522053201295$$
$$x_{29} = -4.70332375945224$$
$$x_{30} = -95.8185759344887$$
$$x_{31} = -45.553093477052$$
$$x_{32} = -61.261056745001$$
Signos de extremos en los puntos:
(-64.40264939859077, -1)
(-20.420352249687454, -0.999999998646202)
(-58.119464091411174, -1)
(-48.6946861306418, 1)
(-7.8543696865741115, -0.999611872117702)
(-86.39379797371932, 1)
(-1.7461395304080125, -0.810220637330316)
(-36.12831551628262, 1)
(-98.96016858807849, 1)
(-92.6769832808989, 1)
(-39.269908169872416, -1)
(-14.137167666100796, -0.999999275053011)
(-23.561944901864948, 1.0000000000585)
(-26.70353755551577, -0.999999999997472)
(-29.845130209102926, 1.00000000000011)
(-70.68583470577035, -1)
(-10.995557511501318, 1.00001677592224)
(-67.54424205218055, 1)
(-89.53539062730911, -1)
(-54.977871437821385, 1)
(-42.411500823462205, 1)
(-51.83627878423159, -1)
(-17.27875956341605, 1.00000003132781)
(-32.98672286269284, -0.999999999999995)
(-80.11061266653972, 1)
(-73.82742735936014, 1)
(-76.96902001294994, -1)
(-83.25220532012952, -1)
(-4.7033237594522435, 1.00902400793843)
(-95.81857593448869, -1)
(-45.553093477052, -1)
(-61.26105674500097, 1)
Intervalos de crecimiento y decrecimiento de la función:Hallemos los intervalos donde la función crece y decrece y también los puntos mínimos y máximos de la función, para lo cual miramos cómo se comporta la función en los extremos con desviación mínima del extremo:
Puntos mínimos de la función:
$$x_{1} = -64.4026493985908$$
$$x_{2} = -20.4203522496875$$
$$x_{3} = -58.1194640914112$$
$$x_{4} = -7.85436968657411$$
$$x_{5} = -1.74613953040801$$
$$x_{6} = -39.2699081698724$$
$$x_{7} = -14.1371676661008$$
$$x_{8} = -26.7035375555158$$
$$x_{9} = -70.6858347057703$$
$$x_{10} = -89.5353906273091$$
$$x_{11} = -51.8362787842316$$
$$x_{12} = -32.9867228626928$$
$$x_{13} = -76.9690200129499$$
$$x_{14} = -83.2522053201295$$
$$x_{15} = -95.8185759344887$$
$$x_{16} = -45.553093477052$$
Puntos máximos de la función:
$$x_{16} = -48.6946861306418$$
$$x_{16} = -86.3937979737193$$
$$x_{16} = -36.1283155162826$$
$$x_{16} = -98.9601685880785$$
$$x_{16} = -92.6769832808989$$
$$x_{16} = -23.5619449018649$$
$$x_{16} = -29.8451302091029$$
$$x_{16} = -10.9955575115013$$
$$x_{16} = -67.5442420521806$$
$$x_{16} = -54.9778714378214$$
$$x_{16} = -42.4115008234622$$
$$x_{16} = -17.278759563416$$
$$x_{16} = -80.1106126665397$$
$$x_{16} = -73.8274273593601$$
$$x_{16} = -4.70332375945224$$
$$x_{16} = -61.261056745001$$
Decrece en los intervalos
$$\left[-1.74613953040801, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -95.8185759344887\right]$$