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$$- e^{x - 1} + 2 \cos{\left(2 x \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -33.7721210260903$$
$$x_{2} = -55.7632696012188$$
$$x_{3} = -21.2057504117879$$
$$x_{4} = -41.6261026600648$$
$$x_{5} = -18.064157759455$$
$$x_{6} = -60.4756585816035$$
$$x_{7} = -71.4712328691678$$
$$x_{8} = -2.36483683449444$$
$$x_{9} = -85.6083998103219$$
$$x_{10} = -32.2013246992954$$
$$x_{11} = -47.9092879672443$$
$$x_{12} = -57.3340659280137$$
$$x_{13} = -54.1924732744239$$
$$x_{14} = -76.1836218495525$$
$$x_{15} = -99.7455667514759$$
$$x_{16} = -16.4933614250271$$
$$x_{17} = 0.612306448549879$$
$$x_{18} = -38.484510006475$$
$$x_{19} = -82.4668071567321$$
$$x_{20} = -77.7544181763474$$
$$x_{21} = -79.3252145031423$$
$$x_{22} = -24.3473430653234$$
$$x_{23} = -0.741528834167563$$
$$x_{24} = -10.2101727402175$$
$$x_{25} = -62.0464549083984$$
$$x_{26} = -11.7809731544128$$
$$x_{27} = -68.329640215578$$
$$x_{28} = -90.3207887907066$$
$$x_{29} = -46.3384916404494$$
$$x_{30} = -5.4981636944435$$
$$x_{31} = -25.9181393921153$$
$$x_{32} = -69.9004365423729$$
$$x_{33} = -98.174770424681$$
$$x_{34} = -3.92517544996218$$
$$x_{35} = -27.4889357189108$$
$$x_{36} = -84.037603483527$$
$$x_{37} = -49.4800842940392$$
$$x_{38} = -40.0553063332699$$
$$x_{39} = -63.6172512351933$$
$$x_{40} = -91.8915851175014$$
$$x_{41} = -93.4623814442964$$
$$x_{42} = -13.3517686315234$$
$$x_{43} = -19.6349540846631$$
$$x_{44} = -35.3429173528852$$
Signos de extremos en los puntos:
(-33.772121026090275, 0.999999999999999)
(-55.76326960121883, 1)
(-21.20575041178787, 0.999999999772927)
(-41.62610266006476, -1)
(-18.064157759454968, 0.999999994745378)
(-60.47565858160352, -1)
(-71.47123286916779, 1)
(-2.3648368344944437, 0.965282967582032)
(-85.60839981032187, -1)
(-32.20132469929538, -1)
(-47.909287967244346, -1)
(-57.33406592801373, -1)
(-54.19247327442393, -1)
(-76.18362184955248, -1)
(-99.74556675147593, 1)
(-16.493361425027103, -1.00000002527724)
(0.6123064485498786, 0.262054288117258)
(-38.48451000647497, -1)
(-82.46680715673207, -1)
(-77.75441817634739, 1)
(-79.32521450314228, -1)
(-24.34734306532335, 0.999999999990187)
(-0.7415288341675627, -1.17140569650397)
(-10.210172740217537, -1.00001353577426)
(-62.04645490839842, 1)
(-11.780973154412795, 0.999997186194732)
(-68.329640215578, 1)
(-90.32078879070656, 1)
(-46.33849164044945, 1)
(-5.4981636944435035, 0.998493513916126)
(-25.918139392115283, -1.00000000000204)
(-69.9004365423729, -1)
(-98.17477042468104, -1)
(-3.925175449962178, -1.00725486103891)
(-27.488935718910795, 0.999999999999576)
(-84.03760348352696, 1)
(-49.480084294039244, 1)
(-40.05530633326986, 1)
(-63.617251235193315, -1)
(-91.89158511750145, -1)
(-93.46238144429635, 1)
(-13.351768631523386, -1.0000005849329)
(-19.634954084663125, -1.00000000109233)
(-35.34291735288517, -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:
$$x_{1} = -41.6261026600648$$
$$x_{2} = -60.4756585816035$$
$$x_{3} = -85.6083998103219$$
$$x_{4} = -32.2013246992954$$
$$x_{5} = -47.9092879672443$$
$$x_{6} = -57.3340659280137$$
$$x_{7} = -54.1924732744239$$
$$x_{8} = -76.1836218495525$$
$$x_{9} = -16.4933614250271$$
$$x_{10} = -38.484510006475$$
$$x_{11} = -82.4668071567321$$
$$x_{12} = -79.3252145031423$$
$$x_{13} = -0.741528834167563$$
$$x_{14} = -10.2101727402175$$
$$x_{15} = -25.9181393921153$$
$$x_{16} = -69.9004365423729$$
$$x_{17} = -98.174770424681$$
$$x_{18} = -3.92517544996218$$
$$x_{19} = -63.6172512351933$$
$$x_{20} = -91.8915851175014$$
$$x_{21} = -13.3517686315234$$
$$x_{22} = -19.6349540846631$$
$$x_{23} = -35.3429173528852$$
Puntos máximos de la función:
$$x_{23} = -33.7721210260903$$
$$x_{23} = -55.7632696012188$$
$$x_{23} = -21.2057504117879$$
$$x_{23} = -18.064157759455$$
$$x_{23} = -71.4712328691678$$
$$x_{23} = -2.36483683449444$$
$$x_{23} = -99.7455667514759$$
$$x_{23} = 0.612306448549879$$
$$x_{23} = -77.7544181763474$$
$$x_{23} = -24.3473430653234$$
$$x_{23} = -62.0464549083984$$
$$x_{23} = -11.7809731544128$$
$$x_{23} = -68.329640215578$$
$$x_{23} = -90.3207887907066$$
$$x_{23} = -46.3384916404494$$
$$x_{23} = -5.4981636944435$$
$$x_{23} = -27.4889357189108$$
$$x_{23} = -84.037603483527$$
$$x_{23} = -49.4800842940392$$
$$x_{23} = -40.0553063332699$$
$$x_{23} = -93.4623814442964$$
Decrece en los intervalos
$$\left[-0.741528834167563, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -98.174770424681\right]$$