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$$- 7 \sin{\left(7 x \right)} + \frac{1}{\sqrt{3 - 2 x}} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -48.0235383853828$$
$$x_{2} = -92.005277232862$$
$$x_{3} = -93.8004589115684$$
$$x_{4} = -41.7404970244311$$
$$x_{5} = -15.7114420179181$$
$$x_{6} = -53.8539343907798$$
$$x_{7} = -70.0109297534926$$
$$x_{8} = -39.9453482510258$$
$$x_{9} = -83.9269650952228$$
$$x_{10} = -8.53173701229299$$
$$x_{11} = -26.027588502925$$
$$x_{12} = -27.8228698479462$$
$$x_{13} = -30.0720980721532$$
$$x_{14} = -45.7753940754083$$
$$x_{15} = -49.8186979987095$$
$$x_{16} = -57.8969371054026$$
$$x_{17} = -79.8846135343777$$
$$x_{18} = -4.0453205320747$$
$$x_{19} = -71.8061465818746$$
$$x_{20} = -35.9015563027617$$
$$x_{21} = -31.8672238234273$$
$$x_{22} = 0.011843010557566$$
$$x_{23} = -81.6798266934498$$
$$x_{24} = -73.1558991269434$$
$$x_{25} = -59.6921052352214$$
$$x_{26} = -19.7440226621522$$
$$x_{27} = -61.9324432264544$$
$$x_{28} = -97.8367233022134$$
$$x_{29} = -65.9752025474228$$
$$x_{30} = -33.2086727603554$$
$$x_{31} = -5.83971418262412$$
$$x_{32} = -89.7582794629219$$
$$x_{33} = -1.78723239967825$$
$$x_{34} = -43.9801572467789$$
$$x_{35} = -9.86929648411665$$
$$x_{36} = -13.9164432056044$$
$$x_{37} = -52.0587063468326$$
$$x_{38} = -67.7703754344952$$
$$x_{39} = -37.6968067820758$$
$$x_{40} = -32.3110425528725$$
$$x_{41} = -75.8486634986945$$
$$x_{42} = -96.0415142363773$$
$$x_{43} = -87.9630685789546$$
$$x_{44} = -17.9486855045077$$
$$x_{45} = -63.7276641383059$$
$$x_{46} = -23.7892141694748$$
$$x_{47} = -74.0534870767904$$
$$x_{48} = -21.9941259993555$$
$$x_{49} = -85.722144745496$$
Signos de extremos en los puntos:
(-48.023538385382814, -10.9521367587898)
(-92.00527723286199, -14.6751256695285)
(-93.8004589115684, -14.8057755869935)
(-41.740497024431086, -10.2993977973246)
(-15.711442017918086, -6.86680536594253)
(-53.8539343907798, -9.52187286040916)
(-70.0109297534926, -10.9592460489313)
(-39.945348251025806, -10.1043096836513)
(-83.92696509522281, -14.0710507928455)
(-8.531737012292988, -5.47871822560782)
(-26.027588502924985, -6.42010294753443)
(-27.822869847946222, -6.65822465636248)
(-30.072098072153224, -8.94617063203695)
(-45.77539407540834, -8.72383088484785)
(-49.81869799870947, -11.1309121742386)
(-57.89693710540264, -11.899174358736)
(-79.88461353437769, -11.758167060605)
(-4.045320532074696, -4.32934092475383)
(-71.80614658187456, -11.1084259376817)
(-35.9015563027617, -7.649015690589)
(-31.867223823427263, -9.16896255772696)
(0.011843010557566003, -0.728634018924508)
(-81.67982669344983, -11.8981097726265)
(-73.15589912694338, -13.2192523521769)
(-59.69210523522139, -12.0626563552676)
(-19.74402266215221, -5.51852565138521)
(-61.93244322645437, -10.2635118159474)
(-97.83672330221337, -13.0952082116244)
(-65.97520254742278, -12.6167400012389)
(-33.20867276035545, -7.33185424620093)
(-5.839714182624125, -4.83067884391322)
(-89.75827946292192, -12.5099248548129)
(-1.787232399678253, -1.56562520200588)
(-43.98015724677889, -8.53742388958547)
(-9.869296484116655, -3.76894893211706)
(-13.91644320560442, -6.55240583695575)
(-52.058706346832636, -9.34984949874665)
(-67.77037543449524, -12.7702598504057)
(-37.696806782075804, -7.8541469771012)
(-32.31104255287251, -7.223415779042)
(-75.84866349869448, -13.4376720539526)
(-96.04151423637734, -12.967264931317)
(-87.96306857895465, -12.3763845226288)
(-17.948685504507697, -5.23703805800253)
(-63.72766413830591, -10.4217824852578)
(-23.789214169474842, -8.1116494915633)
(-74.05348707679036, -13.2924901422487)
(-21.994125999355497, -7.85458054981262)
(-85.72214474549598, -14.2076774749311)
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:
$$x_{1} = -48.0235383853828$$
$$x_{2} = -92.005277232862$$
$$x_{3} = -93.8004589115684$$
$$x_{4} = -41.7404970244311$$
$$x_{5} = -15.7114420179181$$
$$x_{6} = -39.9453482510258$$
$$x_{7} = -83.9269650952228$$
$$x_{8} = -8.53173701229299$$
$$x_{9} = -30.0720980721532$$
$$x_{10} = -49.8186979987095$$
$$x_{11} = -57.8969371054026$$
$$x_{12} = -4.0453205320747$$
$$x_{13} = -31.8672238234273$$
$$x_{14} = -73.1558991269434$$
$$x_{15} = -59.6921052352214$$
$$x_{16} = -65.9752025474228$$
$$x_{17} = -5.83971418262412$$
$$x_{18} = -13.9164432056044$$
$$x_{19} = -67.7703754344952$$
$$x_{20} = -75.8486634986945$$
$$x_{21} = -23.7892141694748$$
$$x_{22} = -74.0534870767904$$
$$x_{23} = -21.9941259993555$$
$$x_{24} = -85.722144745496$$
Puntos máximos de la función:
$$x_{24} = -53.8539343907798$$
$$x_{24} = -70.0109297534926$$
$$x_{24} = -26.027588502925$$
$$x_{24} = -27.8228698479462$$
$$x_{24} = -45.7753940754083$$
$$x_{24} = -79.8846135343777$$
$$x_{24} = -71.8061465818746$$
$$x_{24} = -35.9015563027617$$
$$x_{24} = 0.011843010557566$$
$$x_{24} = -81.6798266934498$$
$$x_{24} = -19.7440226621522$$
$$x_{24} = -61.9324432264544$$
$$x_{24} = -97.8367233022134$$
$$x_{24} = -33.2086727603554$$
$$x_{24} = -89.7582794629219$$
$$x_{24} = -1.78723239967825$$
$$x_{24} = -43.9801572467789$$
$$x_{24} = -9.86929648411665$$
$$x_{24} = -52.0587063468326$$
$$x_{24} = -37.6968067820758$$
$$x_{24} = -32.3110425528725$$
$$x_{24} = -96.0415142363773$$
$$x_{24} = -87.9630685789546$$
$$x_{24} = -17.9486855045077$$
$$x_{24} = -63.7276641383059$$
Decrece en los intervalos
$$\left[-4.0453205320747, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -93.8004589115684\right]$$