Para hallar los extremos hay que resolver la ecuación
dxdf(x)=0(la derivada es igual a cero),
y las raíces de esta ecuación serán los extremos de esta función:
dxdf(x)=primera derivada−4−xlog(4)sign(−2+(41)x)=0Resolvermos esta ecuaciónRaíces de esta ecuación
x1=89.3256855033703x2=115.32568550337x3=49.3256855033703x4=29.3256855033703x5=83.3256855033703x6=77.3256855033703x7=25.3256855033703x8=41.3256855033703x9=37.3256855033703x10=105.32568550337x11=101.32568550337x12=65.3256855033703x13=45.3256855033703x14=71.3256855033703x15=51.3256855033703x16=109.32568550337x17=47.3256855033703x18=23.3256855033703x19=79.3256855033703x20=87.3256855033703x21=85.3256855033703x22=111.32568550337x23=97.3256855033703x24=53.3256855033703x25=91.3256855033703x26=57.3256855033703x27=31.3256855033703x28=93.3256855033703x29=43.3256855033703x30=99.3256855033703x31=59.3256855033703x32=73.3256855033703x33=67.3256855033703x34=103.32568550337x35=95.3256855033703x36=21.3256855033703x37=81.3256855033703x38=69.3256855033703x39=113.32568550337x40=75.3256855033703x41=27.3256855033703x42=63.3256855033703x43=107.32568550337x44=61.3256855033703x45=55.3256855033703x46=33.3256855033703x47=39.3256855033703x48=35.3256855033703Signos de extremos en los puntos:
(89.32568550337031, 2)
(115.32568550337031, 2)
(49.325685503370316, 2)
(29.325685503370313, 2)
(83.32568550337031, 2)
(77.32568550337031, 2)
(25.325685503370313, 2)
(41.325685503370316, 2)
(37.325685503370316, 2)
(105.32568550337031, 2)
(101.32568550337031, 2)
(65.32568550337031, 2)
(45.325685503370316, 2)
(71.32568550337031, 2)
(51.325685503370316, 2)
(109.32568550337031, 2)
(47.325685503370316, 2)
(23.325685503370313, 1.99999999999999)
(79.32568550337031, 2)
(87.32568550337031, 2)
(85.32568550337031, 2)
(111.32568550337031, 2)
(97.32568550337031, 2)
(53.325685503370316, 2)
(91.32568550337031, 2)
(57.325685503370316, 2)
(31.325685503370313, 2)
(93.32568550337031, 2)
(43.325685503370316, 2)
(99.32568550337031, 2)
(59.325685503370316, 2)
(73.32568550337031, 2)
(67.32568550337031, 2)
(103.32568550337031, 2)
(95.32568550337031, 2)
(21.325685503370313, 1.99999999999986)
(81.32568550337031, 2)
(69.32568550337031, 2)
(113.32568550337031, 2)
(75.32568550337031, 2)
(27.325685503370313, 2)
(63.325685503370316, 2)
(107.32568550337031, 2)
(61.325685503370316, 2)
(55.325685503370316, 2)
(33.325685503370316, 2)
(39.325685503370316, 2)
(35.325685503370316, 2)
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
No cambia el valor en todo el eje numérico