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$$\frac{\left(4 - 6 x\right) e^{\cot{\left(5 x \right)}}}{\left(\left(3 x^{2} - 4 x\right) + 2\right)^{2}} + \frac{\left(- 5 \cot^{2}{\left(5 x \right)} - 5\right) e^{\cot{\left(5 x \right)}}}{\left(3 x^{2} - 4 x\right) + 2} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 335.514931427852$$
$$x_{2} = 1019.75378755429$$
$$x_{3} = -635.231494247836$$
$$x_{4} = -32.6791503620253$$
$$x_{5} = 7.53808491830575$$
$$x_{6} = -97.3965169824777$$
$$x_{7} = -39.5910077442618$$
$$x_{8} = -91.7399884166923$$
$$x_{9} = 76.0200282473041$$
$$x_{10} = 78.5336840476006$$
$$x_{11} = 28.268474721344$$
$$x_{12} = 147.021201344517$$
$$x_{13} = -28.2772549992291$$
$$x_{14} = -128.812799299103$$
$$x_{15} = 32.0431513129162$$
$$x_{16} = -78.5453189811991$$
$$x_{17} = -37.7058030607244$$
$$x_{18} = 424.114352027908$$
$$x_{19} = -17.5979468965386$$
$$x_{20} = -43.9881494738643$$
$$x_{21} = -31.4207085815806$$
$$x_{22} = 27.0114145743383$$
$$x_{23} = -21.9956654811782$$
$$x_{24} = 50.2600003676971$$
$$x_{25} = 66.598687701602$$
$$x_{26} = -196.66832073094$$
$$x_{27} = 4128.04861120103$$
$$x_{28} = 6.27884428962574$$
$$x_{29} = -107.449893474849$$
$$x_{30} = -69.747195791893$$
$$x_{31} = -87.9695866561708$$
$$x_{32} = -63.4660384864106$$
$$x_{33} = -162.738718285484$$
$$x_{34} = -82.3148066705778$$
$$x_{35} = -65.979958861579$$
$$x_{36} = 54.0304196704222$$
$$x_{37} = 36.4353471867728$$
$$x_{38} = 85.4436727641258$$
$$x_{39} = 104.923468812092$$
$$x_{40} = 4.39206153344991$$
$$x_{41} = 202.946520154202$$
$$x_{42} = -245.673145785598$$
$$x_{43} = -15.7147154496335$$
$$x_{44} = -55.9256508317329$$
$$x_{45} = 72.2527959829285$$
$$x_{46} = 98.011839301381$$
Signos de extremos en los puntos:
(335.5149314278523, 2.25927390136115e-18)
(1019.7537875542907, 2.67577228891274e-19)
(-635.2314942478357, 2.58351636602771e-66)
(-32.679150362025304, 1.9705800407269e-17)
(7.538084918305748, 7.17534776605072e-53)
(-97.39651698247768, 2.44318187287413e-17)
(-39.59100774426177, 6.3534843473463e-17)
(-91.73998841669226, 5.67207224243958e-21)
(76.02002824730408, 2.74866712271921e-18)
(78.53368404760062, 3.80551681959168e-19)
(28.268474721343967, 6.61695885125593e-19)
(147.0212013445175, 8.21278808022565e-22)
(-28.2772549992291, 7.3610473093945e-34)
(-128.81279929910286, 5.29041271004389e-17)
(32.043151312916166, 1.30853200253986e-83)
(-78.54531898119912, 8.79668504584157e-21)
(-37.70580306072439, 2.39104319834752e-17)
(424.11435202790756, 8.02803918515873e-139)
(-17.597946896538595, 5.34680392246323e-21)
(-43.98814947386435, 2.42968828866003e-19)
(-31.420708581580623, 2.23889790634989e-22)
(27.01141457433826, 7.24120242287718e-18)
(-21.99566548117824, 3.85139830241295e-23)
(50.26000036769705, 1.95812126220511e-20)
(66.59868770160205, 4.51198320453584e-33)
(-196.6683207309399, 1.37307133033823e-24)
(4128.04861120103, 1.95826972531384e-29)
(6.278844289625744, 1.03711150795771e-22)
(-107.44989347484912, 5.77903052836291e-17)
(-69.74719579189299, 1.60040945125353e-27)
(-87.96958665617076, 1.70953621568511e-22)
(-63.46603848641056, 1.28232318052364e-19)
(-162.73871828548374, 3.24346249169498e-26)
(-82.3148066705778, 3.86810243297234e-22)
(-65.97995886157904, 3.49993185606033e-18)
(54.03041967042218, 4.06693429477167e-22)
(36.435347186772844, 1.71661494922671e-16)
(85.44367276412584, 2.06015946691919e-16)
(104.92346881209198, 2.09465795341387e-20)
(4.392061533449906, 1.97848694536472e-16)
(202.946520154202, 1.30635237877456e-243)
(-245.67314578559777, 1.10079228338675e-150)
(-15.714715449633493, 1.71742995899212e-16)
(-55.92565083173285, 4.34149716005887e-21)
(72.25279598292855, 1.46986050367974e-27)
(98.01183930138102, 5.08842227379744e-20)
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:
La función no tiene puntos mínimos
La función no tiene puntos máximos
Decrece en todo el eje numérico