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(2x+1)cos(x)+2sin(x)=0Resolvermos esta ecuaciónRaíces de esta ecuación
x1=39.2950316476879x2=92.6877138973701x3=−7.98676475119172x4=−33.0174658775265x5=67.5589341430727x6=−67.5591531543674x7=−80.1231711644351x8=7.97148100902349x9=76.9819255322054x10=83.2641430354848x11=−95.829065529839x12=58.1365166573738x13=−39.2956785303244x14=−83.2642872382528x15=−26.7416265193495x16=80.123015436615x17=−11.0897262388501x18=20.4680078422429x19=29.8780368458978x20=54.9958888407247x21=−64.4182930958041x22=95.8289566560771x23=−92.6878302742345x24=89.5464955446878x25=51.8553766970605x26=4.89564432915531x27=26.7402314854239x28=48.7150023424838x29=42.4347877496486x30=−36.1563536592178x31=−70.700078740623x32=36.1555897201517x33=−4.93419822854993x34=−20.4703846071522x35=61.2772425220152x36=17.3347711916489x37=−29.8791548121049x38=23.6034090301611x39=−14.2099775813926x40=33.0165500205799x41=−76.9820942237331x42=−42.4353425392198x43=−45.5752749499286x44=105.252809626976x45=86.4053042434102x46=−86.4054381545562x47=−54.9962192754584x48=−48.715423408888x49=70.699878750109x50=45.5747939110765x51=−73.8410614412353x52=1.95728275422062x53=11.0817037582484x54=−61.2775087154266x55=98.9702215094204x56=−98.9703235828905x57=−89.5466202277414x58=−23.6051982121417x59=−58.1368123734526x60=−0.247412484885142x61=−17.3380791158534x62=14.2050661771509x63=64.4180522161792x64=73.8408780976001x65=−2.12300090681457x66=−51.8557483406994Signos de extremos en los puntos:
(39.29503164768789, 79.5649464248379)
(92.68771389737012, -186.364697693097)
(-7.986764751191716, 14.8417215197729)
(-33.01746587752653, 65.0042008467558)
(67.5589341430727, -136.103177516664)
(-67.55915315436735, -134.103396587937)
(-80.12317116443509, -159.233784656253)
(7.971481009023492, 16.8261383769496)
(76.98192553220542, 154.950946440755)
(83.26414303548475, 167.516349064459)
(-95.82906552983897, 190.647641945238)
(58.13651665737381, 117.255982814905)
(-39.2956785303244, 77.5655938310989)
(-83.2642872382528, 165.516493293226)
(-26.741626519349484, 52.4451870984841)
(80.12301543661505, -161.233628898112)
(-11.089726238850124, -21.0856482225243)
(20.46800784224292, 41.8884051837394)
(29.878036845897785, -60.7231819016979)
(54.995888840724724, -110.973762715585)
(-64.41829309580406, 127.820944089557)
(95.8289566560771, 192.647533056656)
(-92.68783027423446, -184.364814086894)
(89.54649554468782, 180.081886742599)
(51.85537669706051, 104.691658383599)
(4.895644329155311, -10.6105958362832)
(26.740231485423934, 54.4437896263579)
(48.715002342483764, -98.4096919670489)
(42.4347877496486, -85.8462938347437)
(-36.156353659217835, -71.2846783594538)
(-70.70007874062303, 140.385914650559)
(36.15558972015174, -73.283913689973)
(-4.934198228549927, -8.65112979640719)
(-20.470384607152152, 39.8907890373943)
(61.2772425220152, -123.538301033815)
(17.334771191648883, -35.6136040006033)
(-29.879154812104865, -58.7243014330717)
(23.60340903016115, -48.165383634478)
(-14.209977581392641, 27.3473053378206)
(33.016550020579906, 67.0032839397468)
(-76.98209422373313, 152.951115167863)
(-42.43534253921977, -83.8468490094031)
(-45.575274949928605, 90.1283729743018)
(105.25280962697555, -211.496163874502)
(86.40530424341024, -173.799102851863)
(-86.40543815455618, -171.799236785429)
(-54.99621927545844, -108.974093286877)
(-48.71542340888797, -96.4101132552267)
(70.69987875010902, 142.385714610033)
(45.5747939110765, 92.1278916459743)
(-73.84106144123533, -146.668489856598)
(1.9572827542206206, 4.55206306571846)
(11.081703758248404, -23.0775442284508)
(-61.27750871542658, -121.538567315839)
(98.9702215094204, -198.930390520815)
(-98.97032358289053, -196.930492607311)
(-89.54662022774141, 178.082011445089)
(-23.605198212141747, -46.1671768296396)
(-58.13681237345261, 115.256278640346)
(-0.2474124848851423, -0.123715373656181)
(-17.338079115853432, -33.6169256769223)
(14.20506617715089, 29.3423635380666)
(64.41805221617925, 129.820703137375)
(73.8408780976001, -148.668306470931)
(-2.123000906814568, 2.76354903624568)
(-51.85574834069936, 102.692030199991)
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=92.6877138973701x2=67.5589341430727x3=−67.5591531543674x4=−80.1231711644351x5=80.123015436615x6=−11.0897262388501x7=29.8780368458978x8=54.9958888407247x9=−92.6878302742345x10=4.89564432915531x11=48.7150023424838x12=42.4347877496486x13=−36.1563536592178x14=36.1555897201517x15=−4.93419822854993x16=61.2772425220152x17=17.3347711916489x18=−29.8791548121049x19=23.6034090301611x20=−42.4353425392198x21=105.252809626976x22=86.4053042434102x23=−86.4054381545562x24=−54.9962192754584x25=−48.715423408888x26=−73.8410614412353x27=11.0817037582484x28=−61.2775087154266x29=98.9702215094204x30=−98.9703235828905x31=−23.6051982121417x32=−0.247412484885142x33=−17.3380791158534x34=73.8408780976001Puntos máximos de la función:
x34=39.2950316476879x34=−7.98676475119172x34=−33.0174658775265x34=7.97148100902349x34=76.9819255322054x34=83.2641430354848x34=−95.829065529839x34=58.1365166573738x34=−39.2956785303244x34=−83.2642872382528x34=−26.7416265193495x34=20.4680078422429x34=−64.4182930958041x34=95.8289566560771x34=89.5464955446878x34=51.8553766970605x34=26.7402314854239x34=−70.700078740623x34=−20.4703846071522x34=−14.2099775813926x34=33.0165500205799x34=−76.9820942237331x34=−45.5752749499286x34=70.699878750109x34=45.5747939110765x34=1.95728275422062x34=−89.5466202277414x34=−58.1368123734526x34=14.2050661771509x34=64.4180522161792x34=−2.12300090681457x34=−51.8557483406994Decrece en los intervalos
[105.252809626976,∞)Crece en los intervalos
(−∞,−98.9703235828905]