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$$- \frac{4 x \log{\left(x \right)}}{\left(x^{2} - 1\right)^{3}} + \frac{1}{x \left(x^{2} - 1\right)^{2}} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 994.79802209141$$
$$x_{2} = 1725.61862682028$$
$$x_{3} = 2243.57786782149$$
$$x_{4} = 2862.35500026547$$
$$x_{5} = 3684.05058075643$$
$$x_{6} = 5013.62757253792$$
$$x_{7} = 1933.10706389741$$
$$x_{8} = 4707.30855089308$$
$$x_{9} = 4809.44508841288$$
$$x_{10} = 3991.42048253229$$
$$x_{11} = 4093.7974387415$$
$$x_{12} = 1829.4188438223$$
$$x_{13} = 4502.94054540882$$
$$x_{14} = 5115.67512917555$$
$$x_{15} = 5217.69457234705$$
$$x_{16} = 783.941938903636$$
$$x_{17} = 2965.25272187248$$
$$x_{18} = 3376.29065127965$$
$$x_{19} = 2759.39669194708$$
$$x_{20} = 3786.54845541179$$
$$x_{21} = 4400.70720221718$$
$$x_{22} = 4196.13675317173$$
$$x_{23} = 1621.69679041648$$
$$x_{24} = 677.938778750613$$
$$x_{25} = 4911.55115403373$$
$$x_{26} = 3478.92338633603$$
$$x_{27} = 464.138325450939$$
$$x_{28} = 1517.64209554598$$
$$x_{29} = 3889.0046073518$$
$$x_{30} = 2346.89163159892$$
$$x_{31} = 4605.14067421585$$
$$x_{32} = 3273.60933950581$$
$$x_{33} = 571.405661546538$$
$$x_{34} = 2140.1797481115$$
$$x_{35} = 2656.37473156072$$
$$x_{36} = 2450.12608735292$$
$$x_{37} = 1204.5340087759$$
$$x_{38} = 2036.69161044985$$
$$x_{39} = 889.53554472855$$
$$x_{40} = 4298.43962916141$$
$$x_{41} = 3581.50944073106$$
$$x_{42} = 1413.44125848094$$
$$x_{43} = 3170.87741092418$$
$$x_{44} = 1309.07836015989$$
$$x_{45} = 3068.09266501104$$
$$x_{46} = 1099.78411393857$$
$$x_{47} = 2553.28576105542$$
Signos de extremos en los puntos:
(994.7980220914103, 7.04806888272018e-12)
(1725.6186268202773, 8.40566342810104e-13)
(2243.5778678214924, 3.04521578902434e-13)
(2862.3550002654683, 1.18573176299208e-13)
(3684.0505807564264, 4.45794190684374e-14)
(5013.627572537918, 1.34842568377356e-14)
(1933.1070638974124, 5.41868206131259e-13)
(4707.3085508930835, 1.7223408865452e-14)
(4809.445088412885, 1.58464078641473e-14)
(3991.4204825322877, 3.26696372705339e-14)
(4093.797438741497, 2.9612377284183e-14)
(1829.4188438222966, 6.70639303189756e-13)
(4502.94054540882, 2.04615977097549e-14)
(5115.675129175551, 1.24695093382705e-14)
(5217.694572347052, 1.15491385373806e-14)
(783.9419389036356, 1.76450395338436e-11)
(2965.252721872483, 1.03408531410574e-13)
(3376.290651279655, 6.25229088814603e-14)
(2759.396691947083, 1.36653405697535e-13)
(3786.5484554117857, 4.00785100226289e-14)
(4400.707202217178, 2.23690371092192e-14)
(4196.1367531717315, 2.69071384227081e-14)
(1621.696790416481, 1.068656957172e-12)
(677.9387787506125, 3.08620492968767e-11)
(4911.55115403373, 1.46053111073136e-14)
(3478.923386336033, 5.56694315186094e-14)
(464.13832545093925, 1.32310891612619e-10)
(1517.6420955459814, 1.38078290041649e-12)
(3889.0046073518006, 3.61357290601579e-14)
(2346.8916315989236, 2.5582155535322e-13)
(4605.140674215851, 1.87546879034831e-14)
(3273.609339505806, 7.04753128457025e-14)
(571.4056615465382, 5.95481429338424e-11)
(2140.179748111498, 3.65525625001973e-13)
(2656.37473156072, 1.58353951135968e-13)
(2450.1260873529204, 2.16549812197637e-13)
(1204.534008775897, 3.3698162114302e-12)
(2036.6916104498491, 4.42794033098202e-13)
(889.5355447285503, 1.08458197297492e-11)
(4298.43962916141, 2.45061429860596e-14)
(3581.509440731058, 4.97366873274973e-14)
(1413.4412584809445, 1.81741418844272e-12)
(3170.8774109241836, 7.97466296802564e-14)
(1309.0783601598894, 2.44391240502862e-12)
(3068.092665011041, 9.06102768098431e-14)
(1099.784113938567, 4.78681852368243e-12)
(2553.2857610554215, 1.84587775340639e-13)
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