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 derivadaxcos(x−1)+sin(x−1)=0Resolvermos esta ecuaciónRaíces de esta ecuación
x1=−91.6878894142842x2=2.9025816596713x3=−35.1567518873749x4=77.9818428080439x5=81.1229390117807x6=−47.7156405519083x7=−69.7001808865412x8=99.9701712382329x9=43.4345199190886x10=−88.5466836249472x11=8.96506651296683x12=15.2028494649391x13=−22.6061518286588x14=52.8551961430023x15=−53.9963890778611x16=87.4052384364358x17=40.2947202239912x18=65.417934536029x19=55.9957280448611x20=74.8407882621237x21=−85.4055062856094x22=−97.9703754007943x23=46.5745611270113x24=34.0161122316173x25=−60.2776451215302x26=12.0781798144108x27=−3.95975747525199x28=24.6025687023826x29=−25.74236450316x30=71.6997808455739x31=−6.99595954344623x32=−72.8411549997741x33=−32.0179451984154x34=62.2771126285488x35=27.7395715348192x36=−16.3398833066804x37=−113.676928488903x38=−79.1232505037716x39=−57.1369641096559x40=90.5464342355346x41=21.4669019371238x42=18.3332512943446x43=96.8289030622188x44=−94.8291208275139x45=−10.0943177411687x46=−66.5592651262192x47=−41.4356299587436x48=84.2640722170426x49=68.5588270317532x50=49.7147981536679x51=0.52026899271959x52=30.8775049299126x53=−50.8559396371055x54=−101.111650976312x55=−82.2643606537498x56=−1.24679137687774x57=−75.9821802337515x58=−44.5755235510474x59=59.1363725465042x60=−63.418416382217x61=−13.2127076381121x62=93.687656640251x63=−38.2960146150878x64=−19.4716638479466x65=−28.8797427274828x66=5.88082214577343x67=37.1552231369057Signos de extremos en los puntos:
(-91.68788941428421, -91.6824366178443)
(2.9025816596712968, 2.74428156512549)
(-35.15675188737488, -35.1425384922561)
(77.98184280804387, 77.9754318497405)
(81.12293901178074, -81.1167762293361)
(-47.71564055190829, -47.7051652580978)
(-69.70018088654118, 69.6930084112843)
(99.97017123823291, -99.9651701216543)
(43.43451991908864, -43.4230129123589)
(-88.54668362494724, 88.5410374261725)
(8.965066512966832, 8.9098095803668)
(15.202849464939055, 15.1700672327781)
(-22.606151828658817, -22.5840663628153)
(52.85519614300229, 52.8457388740002)
(-53.99638907786112, -53.9871315806976)
(87.4052384364358, -87.39951851703)
(40.29472022399124, 40.2823173792352)
(65.41793453602904, 65.4102927112959)
(55.99572804486114, -55.9868009275273)
(74.8407882621237, -74.8341083076369)
(-85.40550628560945, -85.3996524640445)
(-97.97037540079432, -97.9652722159642)
(46.57456112701128, 46.5638293631754)
(34.016112231617306, 34.0014228355276)
(-60.27764512153021, -60.2693518842382)
(12.078179814410767, -12.0369944668751)
(-3.9597574752519944, -3.83922289715174)
(24.602568702382584, -24.5822707686047)
(-25.742364503160008, 25.722963223315)
(71.69978084557387, 71.6928083407641)
(-6.995959543446228, 6.92556658903625)
(-72.84115499977409, -72.8342917185126)
(-32.01794519841537, 32.0023403713893)
(62.27711262854878, -62.2690855490764)
(27.73957153481918, 27.7215642924624)
(-16.339883306680367, -16.3093690231589)
(-113.67692848890253, 113.672530314275)
(-79.1232505037716, -79.116932005665)
(-57.13696410965594, 57.1282152170667)
(90.54643423553456, 90.5409127120238)
(21.46690193712382, 21.4436481058367)
(18.333251294344578, -18.3060391518502)
(96.82890306221881, 96.8237397278082)
(-94.82912082751392, 94.8238486252793)
(-10.09431774116865, -10.0451465534963)
(-66.55926512621922, -66.5517542955715)
(-41.43562995874359, -41.4235683178081)
(84.26407221704262, 84.2581391167382)
(68.55882703175322, -68.5515351883268)
(49.71479815366795, -49.7047438369707)
(0.5202689927195903, -0.240125244155308)
(30.877504929912625, -30.8613246386669)
(-50.85593963710546, 50.8461107939658)
(-101.1116509763116, 101.106706310507)
(-82.26436065374978, 82.2582833611003)
(-1.2467913768777432, 0.972602952761917)
(-75.98218023375154, 75.9756005981902)
(-44.57552355104743, 44.5643108650166)
(59.13637254650418, 59.1279193260472)
(-63.41841638221703, 63.4105337069909)
(-13.21270763811213, 13.1750270846423)
(93.687656640251, -93.6823202138901)
(-38.2960146150878, 38.2829650992537)
(-19.471663847946616, 19.446036191929)
(-28.879742727482828, -28.8624451069843)
(5.880822145773428, -5.79760050138202)
(37.15522313690572, -37.1417733852139)
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=−91.6878894142842x2=−35.1567518873749x3=81.1229390117807x4=−47.7156405519083x5=99.9701712382329x6=43.4345199190886x7=−22.6061518286588x8=−53.9963890778611x9=87.4052384364358x10=55.9957280448611x11=74.8407882621237x12=−85.4055062856094x13=−97.9703754007943x14=−60.2776451215302x15=12.0781798144108x16=−3.95975747525199x17=24.6025687023826x18=−72.8411549997741x19=62.2771126285488x20=−16.3398833066804x21=−79.1232505037716x22=18.3332512943446x23=−10.0943177411687x24=−66.5592651262192x25=−41.4356299587436x26=68.5588270317532x27=49.7147981536679x28=0.52026899271959x29=30.8775049299126x30=93.687656640251x31=−28.8797427274828x32=5.88082214577343x33=37.1552231369057Puntos máximos de la función:
x33=2.9025816596713x33=77.9818428080439x33=−69.7001808865412x33=−88.5466836249472x33=8.96506651296683x33=15.2028494649391x33=52.8551961430023x33=40.2947202239912x33=65.417934536029x33=46.5745611270113x33=34.0161122316173x33=−25.74236450316x33=71.6997808455739x33=−6.99595954344623x33=−32.0179451984154x33=27.7395715348192x33=−113.676928488903x33=−57.1369641096559x33=90.5464342355346x33=21.4669019371238x33=96.8289030622188x33=−94.8291208275139x33=84.2640722170426x33=−50.8559396371055x33=−101.111650976312x33=−82.2643606537498x33=−1.24679137687774x33=−75.9821802337515x33=−44.5755235510474x33=59.1363725465042x33=−63.418416382217x33=−13.2127076381121x33=−38.2960146150878x33=−19.4716638479466Decrece en los intervalos
[99.9701712382329,∞)Crece en los intervalos
(−∞,−97.9703754007943]