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−x5sin(x)+5x4cos(x)=0Resolvermos esta ecuaciónRaíces de esta ecuación
x1=62.9111635112525x2=37.8305186388889x3=97.4406405869711x4=−69.1871806855712x5=−75.4643834089706x6=81.7425005689042x7=−47.2293632804741x8=50.3644346278355x9=−56.6367214297364x10=28.4483142882062x11=6.90959579542153x12=22.2125562085988x13=91.1609800814091x14=−97.4406405869711x15=−40.9621674789216x16=59.7737149408088x17=−66.0490029831692x18=72.3256529801404x19=−4.03356779033998x20=84.8818390729824x21=−53.5002619192185x22=−34.7006238709965x23=31.5729854784403x24=66.0490029831692x25=44.0952059009573x26=1.3138377164929x27=94.30075185089x28=19.1055198623998x29=69.1871806855712x30=75.4643834089706x31=9.89275256512429x32=−81.7425005689042x33=0x34=−28.4483142882062x35=−88.0213377290448x36=47.2293632804741x37=−62.9111635112525x38=−25.3276477920726x39=−12.9352212801115x40=56.6367214297364x41=−100.580635384527x42=−16.0106585966129x43=−22.2125562085988x44=4.03356779033998x45=−72.3256529801404x46=−9.89275256512429x47=−31.5729854784403x48=−59.7737149408088x49=−6.90959579542153x50=100.580635384527x51=103.720726651558x52=−94.30075185089x53=−44.0952059009573x54=−50.3644346278355x55=−91.1609800814091x56=53.5002619192185x57=34.7006238709965x58=78.6033412791698x59=16.0106585966129x60=−84.8818390729824x61=−37.8305186388889x62=−1.3138377164929x63=12.9352212801115x64=40.9621674789216x65=88.0213377290448x66=−78.6033412791698x67=−19.1055198623998x68=25.3276477920726Signos de extremos en los puntos:
(62.91116351125249, 982361343.674869)
(37.830518638888854, 76815876.763504)
(97.44064058697107, -8772626573.89269)
(-69.18718068557116, -1581237269.79774)
(-75.46438340897063, -2442074835.1523)
(81.74250056890423, 3642744051.26235)
(-47.2293632804741, 233690077.851263)
(50.36443462783552, 322470604.989764)
(-56.63672142973645, -580503316.767324)
(28.44831428820623, -18351703.6596154)
(6.909595795421526, 12759.1487492828)
(22.212556208598823, -5275452.6005768)
(91.16098008140906, -6286264691.69339)
(-97.44064058697107, 8772626573.89269)
(-40.96216747892155, 114473011.24935)
(59.77371494080883, -760391276.15604)
(-66.04900298316916, 1253402274.18613)
(72.32565298014042, -1974360702.22499)
(-4.033567790339982, 670.379412457278)
(84.88183907298242, -4398673622.91735)
(-53.500261919218524, 436406435.530439)
(-34.70062387099647, 49799410.9183366)
(31.572985478440316, 30988431.8368961)
(66.04900298316916, -1253402274.18613)
(44.09520590095732, 165646664.621845)
(1.3138377164928983, 0.994905864288247)
(94.30075185089002, 7446739532.87571)
(19.10551986239984, 2462687.0243185)
(69.18718068557116, 1581237269.79774)
(75.46438340897063, 2442074835.1523)
(9.892752565124287, -84564.1022728481)
(-81.74250056890423, -3642744051.26235)
(0, 0)
(-28.44831428820623, 18351703.6596154)
(-88.02133772904483, -5275216316.74103)
(47.2293632804741, -233690077.851263)
(-62.91116351125249, -982361343.674869)
(-25.327647792072558, -10225214.1985132)
(-12.935221280111474, -337777.725370395)
(56.63672142973645, 580503316.767324)
(-100.58063538452689, -10281013219.2145)
(-16.010658596612945, 1004242.32805887)
(-22.212556208598823, 5275452.6005768)
(4.033567790339982, -670.379412457278)
(-72.32565298014042, 1974360702.22499)
(-9.892752565124287, 84564.1022728481)
(-31.572985478440316, -30988431.8368961)
(-59.77371494080883, 760391276.15604)
(-6.909595795421526, -12759.1487492828)
(100.58063538452689, 10281013219.2145)
(103.72072665155811, -11990125266.5391)
(-94.30075185089002, -7446739532.87571)
(-44.09520590095732, -165646664.621845)
(-50.36443462783552, -322470604.989764)
(-91.16098008140906, 6286264691.69339)
(53.500261919218524, -436406435.530439)
(34.70062387099647, -49799410.9183366)
(78.60334127916975, -2994526546.59522)
(16.010658596612945, -1004242.32805887)
(-84.88183907298242, 4398673622.91735)
(-37.830518638888854, -76815876.763504)
(-1.3138377164928983, -0.994905864288247)
(12.935221280111474, 337777.725370395)
(40.96216747892155, -114473011.24935)
(88.02133772904483, 5275216316.74103)
(-78.60334127916975, 2994526546.59522)
(-19.10551986239984, -2462687.0243185)
(25.327647792072558, 10225214.1985132)
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:
x1=97.4406405869711x2=−69.1871806855712x3=−75.4643834089706x4=−56.6367214297364x5=28.4483142882062x6=22.2125562085988x7=91.1609800814091x8=59.7737149408088x9=72.3256529801404x10=84.8818390729824x11=66.0490029831692x12=9.89275256512429x13=−81.7425005689042x14=−88.0213377290448x15=47.2293632804741x16=−62.9111635112525x17=−25.3276477920726x18=−12.9352212801115x19=−100.580635384527x20=4.03356779033998x21=−31.5729854784403x22=−6.90959579542153x23=103.720726651558x24=−94.30075185089x25=−44.0952059009573x26=−50.3644346278355x27=53.5002619192185x28=34.7006238709965x29=78.6033412791698x30=16.0106585966129x31=−37.8305186388889x32=−1.3138377164929x33=40.9621674789216x34=−19.1055198623998Puntos máximos de la función:
x34=62.9111635112525x34=37.8305186388889x34=81.7425005689042x34=−47.2293632804741x34=50.3644346278355x34=6.90959579542153x34=−97.4406405869711x34=−40.9621674789216x34=−66.0490029831692x34=−4.03356779033998x34=−53.5002619192185x34=−34.7006238709965x34=31.5729854784403x34=44.0952059009573x34=1.3138377164929x34=94.30075185089x34=19.1055198623998x34=69.1871806855712x34=75.4643834089706x34=−28.4483142882062x34=56.6367214297364x34=−16.0106585966129x34=−22.2125562085988x34=−72.3256529801404x34=−9.89275256512429x34=−59.7737149408088x34=100.580635384527x34=−91.1609800814091x34=−84.8818390729824x34=12.9352212801115x34=88.0213377290448x34=−78.6033412791698x34=25.3276477920726Decrece en los intervalos
[103.720726651558,∞)Crece en los intervalos
(−∞,−100.580635384527]