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$$\frac{22 \cos{\left(22 x \right)}}{x} - \frac{\sin{\left(22 x \right)}}{x^{2}} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -73.7559995134782$$
$$x_{2} = 10.6383809102054$$
$$x_{3} = 79.4679881698716$$
$$x_{4} = -39.6268551957958$$
$$x_{5} = -4.78335688798353$$
$$x_{6} = -71.7568034080087$$
$$x_{7} = 81.7527835536473$$
$$x_{8} = 39.1984556277501$$
$$x_{9} = -36.6280579395588$$
$$x_{10} = -45.6244480248275$$
$$x_{11} = -87.7503712560295$$
$$x_{12} = 91.6059632309788$$
$$x_{13} = 37.1992574699989$$
$$x_{14} = 71.6140036845221$$
$$x_{15} = -97.746350288943$$
$$x_{16} = -47.623645250872$$
$$x_{17} = 8.63914064202964$$
$$x_{18} = -75.7551955777548$$
$$x_{19} = -77.7543916040159$$
$$x_{20} = 102.31594054729$$
$$x_{21} = 97.8891499858505$$
$$x_{22} = -57720.1248252043$$
$$x_{23} = 60.1900249229188$$
$$x_{24} = -33.6292599220188$$
$$x_{25} = -4.06928276956442$$
$$x_{26} = 153.152628371936$$
$$x_{27} = -23.9188576870084$$
$$x_{28} = 27.3460604984894$$
$$x_{29} = -85.7511753820829$$
$$x_{30} = -35.628458694461$$
$$x_{31} = -29.2024609604108$$
$$x_{32} = -61.7608221227593$$
$$x_{33} = 16.9216383308224$$
$$x_{34} = -12.3520038463281$$
$$x_{35} = 67.4728115976935$$
$$x_{36} = 14.4940235573095$$
$$x_{37} = -93.7479587373952$$
$$x_{38} = -63.7600184967055$$
$$x_{39} = -69.7576072578047$$
$$x_{40} = 57.3340298915573$$
$$x_{41} = -58.0480286651718$$
$$x_{42} = 75.7551955777548$$
$$x_{43} = -59.7616256786334$$
$$x_{44} = 19.6348488581516$$
$$x_{45} = 43.3396509803066$$
$$x_{46} = 99.3171469500482$$
$$x_{47} = -113.454316483422$$
$$x_{48} = -79.7535875951204$$
$$x_{49} = -594.260806882941$$
$$x_{50} = -91.7487629321552$$
$$x_{51} = 73.0420009092864$$
$$x_{52} = -53.6212360784754$$
$$x_{53} = -21.9196544836386$$
$$x_{54} = 83.0379809394492$$
$$x_{55} = -65.7592148068727$$
$$x_{56} = -36.0568583816761$$
$$x_{57} = -39.4840553411545$$
$$x_{58} = 155.437423227392$$
$$x_{59} = -1167.17306887146$$
$$x_{60} = -95.747154522581$$
$$x_{61} = -15.3508295100635$$
$$x_{62} = 93.6051590377012$$
$$x_{63} = -99.7455460376131$$
$$x_{64} = -144.299048247732$$
$$x_{65} = 35.628458694461$$
$$x_{66} = 32.0584605848909$$
$$x_{67} = -51.6220392612265$$
$$x_{68} = -81.7527835536473$$
$$x_{69} = 70.9000050636196$$
$$x_{70} = 41.1976535105726$$
$$x_{71} = 4.49773012837872$$
$$x_{72} = -83.7519794819297$$
$$x_{73} = 23.2048566987846$$
$$x_{74} = 66.1876140084515$$
$$x_{75} = -41.6260530249269$$
$$x_{76} = -49.6228423237395$$
$$x_{77} = -67.7584110589064$$
$$x_{78} = -43.6252506245473$$
$$x_{79} = 18.9208465569382$$
$$x_{80} = -89.7495671055207$$
$$x_{81} = 127.163086389588$$
$$x_{82} = 88.035970664558$$
$$x_{83} = -27.4888605570532$$
$$x_{84} = -31.4872607514679$$
$$x_{85} = -7.35390185127117$$
$$x_{86} = -37.6276571005717$$
Signos de extremos en los puntos:
(-73.75599951347822, 0.0135582165070536)
(10.638380910205363, 0.0939984082736701)
(79.4679881698716, 0.0125836812966583)
(-39.62685519579584, -0.025235394965903)
(-4.783356887983527, -0.209048765613238)
(-71.75680340800872, 0.0139359580119932)
(81.7527835536473, 0.0122319975169511)
(39.198455627750086, 0.0255111920010486)
(-36.62805793955876, 0.027301453755483)
(-45.62444802482752, -0.0219180625083552)
(-87.75037125602945, 0.0113959616526429)
(91.6059632309788, -0.010916318562943)
(37.199257469998905, 0.0268822369441687)
(71.61400368452206, -0.0139637465735499)
(-97.74635028894302, 0.0102305599024374)
(-47.623645250872, -0.020997963075736)
(8.63914064202964, 0.115750651622658)
(-75.7551955777548, 0.013200412359339)
(-77.75439160401591, 0.0128610076999801)
(102.31594054729015, 0.00977364715575082)
(97.8891499858505, -0.0102156356688707)
(-57720.12482520429, -1.73249798580308e-5)
(60.1900249229188, -0.0166140438740355)
(-33.62925992201881, -0.0297359825598027)
(-4.069282769564418, 0.245728221951818)
(153.15262837193643, 0.00652943385031948)
(-23.918857687008437, -0.0418079411399161)
(27.346060498489393, -0.036568288094306)
(-85.75117538208289, 0.0116616460946992)
(-35.628458694461, -0.0280674276356588)
(-29.20246096041081, 0.0342436478200582)
(-61.760822122759286, 0.0161914899251401)
(16.921638330822365, 0.0590957194977918)
(-12.35200384632811, 0.0809579758520661)
(67.4728115976935, 0.014820781132489)
(14.494023557309545, -0.0689936150962974)
(-93.74795873739524, 0.0106668976682154)
(-63.760018496705456, 0.0156838057683162)
(-69.75760725780465, 0.0143353510393283)
(57.33402989155731, -0.0174416430804515)
(-58.048028665171834, 0.0172271085928536)
(75.7551955777548, 0.013200412359339)
(-59.761625678633436, 0.0167331410313918)
(19.6348488581516, -0.0509297182595015)
(43.33965098030655, -0.0230735464497875)
(99.3171469500482, -0.0100687537447259)
(-113.45431648342172, 0.00881411964514539)
(-79.75358759512035, 0.0125386188601621)
(-594.2608068829411, -0.00168276282987594)
(-91.74876293215517, 0.0108993281796833)
(73.0420009092864, -0.0136907504438305)
(-53.621236078475434, -0.0186493209377312)
(-21.919654483638553, -0.0456210589751957)
(83.03798093944918, -0.0120426802153196)
(-65.7592148068727, 0.015206990595)
(-36.056858381676115, 0.0277339527147647)
(-39.4840553411545, 0.0253266623378736)
(155.4374232273922, 0.00643345686308419)
(-1167.1730688714563, -0.000856770967315567)
(-95.74715452258103, 0.0104441734305265)
(-15.350829510063548, -0.0651427739113487)
(93.60515903770124, -0.0106831705899265)
(-99.7455460376131, 0.0100255092672448)
(-144.299048247732, 0.00693005229438488)
(35.628458694461, -0.0280674276356588)
(32.05846058489091, 0.0311929823387491)
(-51.62203926122646, -0.0193715635152823)
(-81.7527835536473, 0.0122319975169511)
(70.90000506361962, 0.0141043684495248)
(41.19765351057264, 0.0242732123342177)
(4.497730128378722, -0.222323018203089)
(-83.75197948192971, 0.0119400145394646)
(23.204856698784628, 0.0430943441911259)
(66.18761400845146, -0.0151085634248354)
(-41.62605302492688, -0.0240234019593133)
(-49.62284232373947, -0.0201520012486964)
(-67.75841105890638, 0.0147583120584481)
(-43.62525062454728, -0.0229224919713491)
(18.920846556938223, 0.0528516053102666)
(-89.74956710552067, 0.0111421135945263)
(127.16308638958809, 0.00786391683708262)
(88.03597066455802, 0.0113589917752851)
(-27.488860557053215, 0.0363783224405772)
(-31.48726075146789, 0.0317588425975038)
(-7.353901851271167, -0.135979636161221)
(-37.62765710057169, -0.026576176871316)
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:
$$x_{1} = -39.6268551957958$$
$$x_{2} = -4.78335688798353$$
$$x_{3} = -45.6244480248275$$
$$x_{4} = 91.6059632309788$$
$$x_{5} = 71.6140036845221$$
$$x_{6} = -47.623645250872$$
$$x_{7} = 97.8891499858505$$
$$x_{8} = -57720.1248252043$$
$$x_{9} = 60.1900249229188$$
$$x_{10} = -33.6292599220188$$
$$x_{11} = -23.9188576870084$$
$$x_{12} = 27.3460604984894$$
$$x_{13} = -35.628458694461$$
$$x_{14} = 14.4940235573095$$
$$x_{15} = 57.3340298915573$$
$$x_{16} = 19.6348488581516$$
$$x_{17} = 43.3396509803066$$
$$x_{18} = 99.3171469500482$$
$$x_{19} = -594.260806882941$$
$$x_{20} = 73.0420009092864$$
$$x_{21} = -53.6212360784754$$
$$x_{22} = -21.9196544836386$$
$$x_{23} = 83.0379809394492$$
$$x_{24} = -1167.17306887146$$
$$x_{25} = -15.3508295100635$$
$$x_{26} = 93.6051590377012$$
$$x_{27} = 35.628458694461$$
$$x_{28} = -51.6220392612265$$
$$x_{29} = 4.49773012837872$$
$$x_{30} = 66.1876140084515$$
$$x_{31} = -41.6260530249269$$
$$x_{32} = -49.6228423237395$$
$$x_{33} = -43.6252506245473$$
$$x_{34} = -7.35390185127117$$
$$x_{35} = -37.6276571005717$$
Puntos máximos de la función:
$$x_{35} = -73.7559995134782$$
$$x_{35} = 10.6383809102054$$
$$x_{35} = 79.4679881698716$$
$$x_{35} = -71.7568034080087$$
$$x_{35} = 81.7527835536473$$
$$x_{35} = 39.1984556277501$$
$$x_{35} = -36.6280579395588$$
$$x_{35} = -87.7503712560295$$
$$x_{35} = 37.1992574699989$$
$$x_{35} = -97.746350288943$$
$$x_{35} = 8.63914064202964$$
$$x_{35} = -75.7551955777548$$
$$x_{35} = -77.7543916040159$$
$$x_{35} = 102.31594054729$$
$$x_{35} = -4.06928276956442$$
$$x_{35} = 153.152628371936$$
$$x_{35} = -85.7511753820829$$
$$x_{35} = -29.2024609604108$$
$$x_{35} = -61.7608221227593$$
$$x_{35} = 16.9216383308224$$
$$x_{35} = -12.3520038463281$$
$$x_{35} = 67.4728115976935$$
$$x_{35} = -93.7479587373952$$
$$x_{35} = -63.7600184967055$$
$$x_{35} = -69.7576072578047$$
$$x_{35} = -58.0480286651718$$
$$x_{35} = 75.7551955777548$$
$$x_{35} = -59.7616256786334$$
$$x_{35} = -113.454316483422$$
$$x_{35} = -79.7535875951204$$
$$x_{35} = -91.7487629321552$$
$$x_{35} = -65.7592148068727$$
$$x_{35} = -36.0568583816761$$
$$x_{35} = -39.4840553411545$$
$$x_{35} = 155.437423227392$$
$$x_{35} = -95.747154522581$$
$$x_{35} = -99.7455460376131$$
$$x_{35} = -144.299048247732$$
$$x_{35} = 32.0584605848909$$
$$x_{35} = -81.7527835536473$$
$$x_{35} = 70.9000050636196$$
$$x_{35} = 41.1976535105726$$
$$x_{35} = -83.7519794819297$$
$$x_{35} = 23.2048566987846$$
$$x_{35} = -67.7584110589064$$
$$x_{35} = 18.9208465569382$$
$$x_{35} = -89.7495671055207$$
$$x_{35} = 127.163086389588$$
$$x_{35} = 88.035970664558$$
$$x_{35} = -27.4888605570532$$
$$x_{35} = -31.4872607514679$$
Decrece en los intervalos
$$\left[99.3171469500482, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -57720.1248252043\right]$$