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$$\frac{\left(- x^{2} e^{- \frac{x^{2}}{2}} + \sqrt{e^{- x^{2}}}\right) e^{\frac{x^{2}}{2}} W\left(x \sqrt{e^{- x^{2}}}\right)}{x^{2} \left(W\left(x \sqrt{e^{- x^{2}}}\right) + 1\right)} - \frac{W\left(x \sqrt{e^{- x^{2}}}\right)}{x^{2}} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 68.5473054354995$$
$$x_{2} = -74.2649444149412$$
$$x_{3} = 98.4567232107033$$
$$x_{4} = 72.5309015703522$$
$$x_{5} = -76.2579924560991$$
$$x_{6} = -28.6943596043799$$
$$x_{7} = 15.6247818795334$$
$$x_{8} = -96.2043534607085$$
$$x_{9} = -24.8076741592432$$
$$x_{10} = 58.5981051512238$$
$$x_{11} = -34.5735053916839$$
$$x_{12} = -92.2132213430942$$
$$x_{13} = -84.2334824940775$$
$$x_{14} = 34.8392502079753$$
$$x_{15} = 52.6378406446428$$
$$x_{16} = -15.3593372555059$$
$$x_{17} = 25.0766626196802$$
$$x_{18} = 44.7073945322353$$
$$x_{19} = 27.0151495573047$$
$$x_{20} = 10.4810551180426$$
$$x_{21} = -20.9648808652053$$
$$x_{22} = 90.4750104191475$$
$$x_{23} = -17.1969684851483$$
$$x_{24} = -86.228064985273$$
$$x_{25} = -36.5420283825472$$
$$x_{26} = 23.1487959086869$$
$$x_{27} = -70.2800343339193$$
$$x_{28} = -22.8793491121891$$
$$x_{29} = -50.3914159606663$$
$$x_{30} = -13.5703851876112$$
$$x_{31} = -98.2001902620909$$
$$x_{32} = -7.68768138260503$$
$$x_{33} = 21.2345123835376$$
$$x_{34} = -90.2179499984874$$
$$x_{35} = -46.4252005910588$$
$$x_{36} = 50.6531744084895$$
$$x_{37} = -10.247960314217$$
$$x_{38} = -32.6088462722306$$
$$x_{39} = -68.2882415884721$$
$$x_{40} = 88.4800986212492$$
$$x_{41} = -88.2228929179074$$
$$x_{42} = -40.4883834667848$$
$$x_{43} = 94.4654798903143$$
$$x_{44} = 19.3379596244699$$
$$x_{45} = 74.5233591950223$$
$$x_{46} = 84.4909972102885$$
$$x_{47} = -44.4443699549213$$
$$x_{48} = 42.7288452402976$$
$$x_{49} = 13.8305646213614$$
$$x_{50} = -26.7467597908737$$
$$x_{51} = -100.196193168581$$
$$x_{52} = 36.8071620516744$$
$$x_{53} = -8.82065711418988$$
$$x_{54} = 100.45260622169$$
$$x_{55} = -62.3160212977879$$
$$x_{56} = -82.2391633180928$$
$$x_{57} = 12.1040591364533$$
$$x_{58} = 60.5866054706585$$
$$x_{59} = -80.2451271074651$$
$$x_{60} = 62.5758396530863$$
$$x_{61} = 96.4610108264976$$
$$x_{62} = -64.3061861108853$$
$$x_{63} = 92.4701421572582$$
$$x_{64} = -58.3377124249816$$
$$x_{65} = 70.5388712182941$$
$$x_{66} = -52.3764545425553$$
$$x_{67} = -94.2086933283192$$
$$x_{68} = 82.4968425477036$$
$$x_{69} = 48.6697660202548$$
$$x_{70} = -56.3497113142373$$
$$x_{71} = -30.6488081209205$$
$$x_{72} = -60.3265078154327$$
$$x_{73} = -48.4076116917235$$
$$x_{74} = 28.9620890166341$$
$$x_{75} = 56.6104161729572$$
$$x_{76} = -54.362591820007$$
$$x_{77} = 54.623627287895$$
$$x_{78} = 7.83686490645478$$
$$x_{79} = -11.8535751456397$$
$$x_{80} = 78.5094259967043$$
$$x_{81} = 9.02289695499675$$
$$x_{82} = 76.5162106782208$$
$$x_{83} = 40.7523965392307$$
$$x_{84} = 17.465102009593$$
$$x_{85} = 66.5562459808845$$
$$x_{86} = -19.0686408223086$$
$$x_{87} = -72.2722807950237$$
$$x_{88} = 30.9158612891769$$
$$x_{89} = 64.5657397621909$$
$$x_{90} = 32.8752332341382$$
$$x_{91} = 80.5029780991381$$
$$x_{92} = 86.4854219951314$$
$$x_{93} = -78.2513955147154$$
$$x_{94} = 46.6877762829739$$
$$x_{95} = -38.5138150497611$$
$$x_{96} = -42.4653421912683$$
$$x_{97} = -66.2969435075443$$
$$x_{98} = 38.7783713446935$$
Signos de extremos en los puntos:
(68.54730543549952, 4.82031227394403e-1021)
(-74.26494441494121, 2.35362555752321e-1198)
(98.45672321070329, 1.08160717280565e-2105)
(72.5309015703522, 4.43230599003598e-1143)
(-76.25799245609907, 1.68921805793219e-1263)
(-28.69435960437989, 1.61542017513745e-179)
(15.624781879533398, 9.70547957044729e-54)
(-96.2043534607085, 1.74582028324948e-2010)
(-24.807674159243177, 2.30724429290355e-134)
(58.598105151223834, 2.36201653131843e-746)
(-34.57350539168385, 2.74144908586576e-260)
(-92.21322134309419, 3.44034420083174e-1847)
(-84.23348249407753, 1.9037807240392e-1541)
(34.83925020797529, 2.70685386071025e-264)
(52.637840644642765, 2.19260890801306e-602)
(-15.359337255505897, 5.92869648316435e-52)
(25.07666261968023, 2.81413144742492e-137)
(44.70739453223533, 9.47780284440881e-435)
(27.01514955730468, 3.3263545821833e-159)
(10.481055118042562, 1.39903685357388e-24)
(-20.964880865205323, 3.61486344845391e-96)
(90.47501041914748, 3.10352999273789e-1778)
(-17.196968485148272, 6.05066694628083e-65)
(-86.22806498527301, 2.81603434092229e-1615)
(-36.542028382547215, 1.09390932081865e-290)
(23.1487959086869, 4.34523511677173e-117)
(-70.28003433391933, 2.80721192749264e-1073)
(-22.879349112189093, 2.1433986053126e-114)
(-50.39141596066627, 3.97319307435429e-552)
(-13.57038518761119, 1.02606043620113e-40)
(-98.20019026209087, 9.74823328548446e-2095)
(-7.687681382605025, 1.46724088582559e-13)
(21.23451238353765, 1.2227238452565e-98)
(-90.21794999848743, 3.78555856260199e-1768)
(-46.425200591058825, 9.60980233587364e-469)
(50.65317440848955, 7.17385424830634e-558)
(-10.247960314216956, 1.566919888556e-23)
(-32.60884627223058, 1.25700119293546e-231)
(-68.28824158847213, 2.40302793130379e-1013)
(88.48009862124916, 1.0312091820997e-1700)
(-88.22289291790742, 7.62913789956981e-1691)
(-40.48838346678479, 1.06790120243364e-356)
(94.46547989031433, 1.72713638589383e-1938)
(19.337959624469928, 6.2565968724807e-82)
(74.52335919502231, 1.05346980859634e-1206)
(84.49099721028851, 6.99485192550893e-1551)
(-44.44436995492126, 1.1711598112743e-429)
(42.72884524029763, 3.48746159180186e-397)
(13.830564621361363, 2.90465619215689e-42)
(-26.74675979087374, 4.52082659317584e-156)
(-100.19619316858123, 9.96944666258599e-2181)
(36.80716205167437, 6.54704160419386e-295)
(-8.82065711418988, 1.27373129166641e-17)
(100.45260622168976, 6.70917154753397e-2192)
(-62.31602129778792, 5.68916389122711e-844)
(-82.23916331809285, 2.35728369221517e-1469)
(12.10405913645333, 1.5351056199082e-32)
(60.586605470658476, 8.12156590184954e-798)
(-80.24512710746508, 5.34591571744502e-1399)
(62.575839653086256, 5.11439950432004e-851)
(96.46101082649756, 3.19366163385579e-2021)
(-64.30618611088535, 1.08180121625321e-898)
(92.47014215725818, 1.71073379469617e-1857)
(-58.337712424981596, 9.66608459956877e-740)
(70.53887121829413, 3.41544964166352e-1081)
(-52.37645454255525, 2.00214719120909e-596)
(-94.20869332831917, 5.72653123253108e-1928)
(82.49684254770361, 1.42796774324628e-1478)
(48.66976602025484, 4.29847650499965e-515)
(-56.349711314237275, 3.12280478315665e-690)
(-30.648808120920528, 1.05404943814838e-204)
(-60.326507815432706, 5.47962109630034e-791)
(-48.407611691723474, 1.44394288393636e-509)
(28.962089016634078, 7.1833935752502e-183)
(56.610416172957216, 1.25811565057559e-696)
(-54.362591820007005, 1.84768777834024e-642)
(54.623627287895, 1.22729335061317e-648)
(7.836864906454783, 4.60879078917943e-14)
(-11.853575145639718, 3.08489004883961e-31)
(78.50942599670425, 3.65630967428387e-1339)
(9.022896954996751, 2.09634833633054e-18)
(76.51621067822079, 4.58591665963617e-1272)
(40.75239653923073, 2.34974479761189e-361)
(17.46510200959298, 5.80260600504341e-67)
(66.55624598088446, 1.24597695657418e-962)
(-19.06864082230857, 1.10262195767039e-79)
(-72.2722807950237, 6.00621574723043e-1135)
(30.915861289176938, 2.83618465308492e-208)
(64.5657397621909, 5.89862181605406e-906)
(32.8752332341382, 2.04831346410163e-235)
(80.50297809913809, 5.33916631748338e-1408)
(86.48542199513139, 6.27558857446106e-1625)
(-78.25139551471544, 2.22048065090639e-1330)
(46.68777628297386, 4.71668845417238e-474)
(-38.51381504976113, 7.98855740547038e-323)
(-42.46534219126834, 2.6135586050952e-392)
(-66.2969435075443, 3.76747338849005e-955)
(38.77837134469346, 2.89876080074486e-327)
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