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 derivada2xsin(x2)+cos(x)=0Resolvermos esta ecuaciónRaíces de esta ecuación
x1=22.349323885059x2=−47.4608457084011x3=−22.4903520904245x4=6.3967526067572x5=56.2735892190937x6=96.0892263352259x7=−99.1940994186411x8=42.2424741036786x9=52.2497863224473x10=−43.8482155265515x11=−7.72541014397883x12=−19.816274863823x13=90.6554540354125x14=−0.730978270667906x15=−9.87092112794122x16=28.2485792398582x17=14.7224702337865x18=−41.8314912305025x19=98.0953333197619x20=−74.0622869224726x21=87.7857185656868x22=−81.840586323002x23=−5.87191528001199x24=87.8035463465879x25=66.3427786515794x26=−72.1935532053449x27=−77.7257170387604x28=−83.9440058712679x29=64.2499148858234x30=16.2456215982105x31=−61.8584222114262x32=−39.7914116037745x33=18.2479103002405x34=69.3298616312379x35=93.7559147144186x36=−53.8778557584569x37=8.12140237825279x38=29.2322260727598x39=1.75748767956681x40=79.7604098082138x41=−3.97400948361753x42=27.2863953811205x43=82.2044467599582x44=60.885813954976x45=−15.3508947858058x46=11.0691206807264x47=−15.7549206941732x48=47.2616324020612x49=46.1858745664205x50=−33.8628507747295x51=−46.928316630699x52=−1.78948236293348x53=−65.5808461895275x54=−51.1560410192306x55=36.7972126661047x56=−91.9286709217352x57=22.1384461152026x58=6.13338537866179x59=−87.1571856052754x60=3.95230187084535x61=85.4278345722129x62=57.5433221417068x63=−89.7498878995054x64=48.1833155017359x65=78.44981619248x66=−72.106467795218x67=9.71067451011131x68=−11.621672446497x69=−40.1453184602676x70=−17.9879387647864x71=−89.8897901584974x72=−14.0683294162172x73=−22.0673844234238x74=99.6364875148062x75=44.7697244998911x76=80.3686064857456x77=94.1405234555763x78=31.2578168207404x79=−49.2792605670951x80=−55.8533314248926x81=57.7341585233858x82=−95.8600997718734Signos de extremos en los puntos:
(22.34932388505898, 0.899214550998202)
(-47.46084570840113, 1.58056628769818)
(-22.490352090424498, 1.7285358978664)
(6.396752606757205, 1.36030314711518)
(56.27358921909367, -1.02158596885626)
(96.08922633522592, 2.21359624249138)
(-99.19409941864106, 0.222763416653808)
(42.242474103678596, -1.73574697954699)
(52.24978632244733, 2.16570965376942)
(-43.848215526551456, -0.616255911808996)
(-7.725410143978831, 0.258219501823969)
(-19.816274863823022, 0.426870799296581)
(90.65545403541253, -0.31436230477943)
(-0.7309782706679064, -1.27820871872329)
(-9.87092112794122, 1.68044483800528)
(28.24857923985821, -0.724091651171351)
(14.722470233786547, 2.0833685437479)
(-41.831491230502486, 2.08643593813823)
(98.09533331976195, 0.601226993957887)
(-74.06228692247262, 0.222548265536392)
(87.78571856568684, 1.07206093361989)
(-81.84058632300203, -0.908487796295731)
(-5.871915280011989, 1.64672316794882)
(87.8035463465879, -0.910336890591339)
(66.34277865157937, 0.888981880025799)
(-72.19355320534488, 1.18694010507801)
(-77.72571703876044, 0.522882705493363)
(-83.94400587126786, 0.479894133412259)
(64.2499148858234, 0.23835944207481)
(16.24562159821051, -1.26177664427882)
(-61.85842221142619, 0.0768306534387587)
(-39.79141160377455, -1.61705157908055)
(18.24791030024052, -1.3157447333335)
(69.32986163123788, -0.536800429133705)
(93.75591471441857, -1.22225947668199)
(-53.87785575845691, -0.296383649424088)
(8.121402378252785, 2.21432331894488)
(29.23222607275975, -1.56793247208485)
(1.757487679566813, 2.23122856178744)
(79.76040980821381, 0.310694553304226)
(-3.9740094836175293, 1.98596791565122)
(27.286395381120506, 2.08484221611745)
(82.20444675995824, 1.74950019091033)
(60.88581395497595, -1.68041413795555)
(-15.3508947858058, 0.900005123632314)
(11.069120680726392, 0.252697808719373)
(-15.754920694173173, 1.29643756401958)
(47.26163240206123, 1.1126376460065)
(46.18587456642046, 2.05636542658033)
(-33.8628507747295, 0.609804928108061)
(-46.92831663069898, 1.05561656898399)
(-1.7894823629334766, 0.271977728650254)
(-65.58084618952749, 0.867383727832319)
(-51.15604101923061, 0.472557911280981)
(36.79721266610471, 0.465458455391031)
(-91.92867092173525, -0.0171549645821363)
(22.138446115202626, -0.89651589398298)
(6.13338537866179, -0.895986177863084)
(-87.15718560527543, -0.0274940903763204)
(3.9523018708453495, 0.521418115405953)
(85.42783457221287, 0.68136376085504)
(57.54332214170678, 0.0885819277160163)
(-89.74988789950542, -1.72708282333138)
(48.183315501735876, 0.377912527419599)
(78.44981619247996, 1.33985854897891)
(-72.10646779521804, 1.10037696142293)
(9.710674510111312, -1.03079681074621)
(-11.621672446496989, 2.06000225359449)
(-40.145318460267575, 0.609272386516736)
(-17.98793876478641, 2.00873282272673)
(-89.88979015849739, -1.6878531739228)
(-14.068329416217198, 0.252365378903732)
(-22.067384423423757, 1.32590679062373)
(99.63648751480619, -1.52987714544096)
(44.76972449989114, -0.0414287677900198)
(80.36860648574562, -1.71690252331832)
(94.1405234555763, 1.14293543038608)
(31.257816820740402, 1.09242344557681)
(-49.27926056709511, 2.08393133091633)
(-55.85333142489263, 1.89062010610832)
(57.73415852338577, 2.17667833321499)
(-95.86009977187342, 0.25086196722793)
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=56.2735892190937x2=−99.1940994186411x3=42.2424741036786x4=−43.8482155265515x5=90.6554540354125x6=−0.730978270667906x7=28.2485792398582x8=−74.0622869224726x9=−81.840586323002x10=87.8035463465879x11=64.2499148858234x12=16.2456215982105x13=−61.8584222114262x14=−39.7914116037745x15=18.2479103002405x16=69.3298616312379x17=93.7559147144186x18=−53.8778557584569x19=29.2322260727598x20=60.885813954976x21=−91.9286709217352x22=22.1384461152026x23=6.13338537866179x24=−87.1571856052754x25=57.5433221417068x26=−89.7498878995054x27=9.71067451011131x28=−89.8897901584974x29=99.6364875148062x30=44.7697244998911x31=80.3686064857456Puntos máximos de la función:
x31=22.349323885059x31=−47.4608457084011x31=−22.4903520904245x31=6.3967526067572x31=96.0892263352259x31=52.2497863224473x31=−7.72541014397883x31=−19.816274863823x31=−9.87092112794122x31=14.7224702337865x31=−41.8314912305025x31=98.0953333197619x31=87.7857185656868x31=−5.87191528001199x31=66.3427786515794x31=−72.1935532053449x31=−77.7257170387604x31=−83.9440058712679x31=8.12140237825279x31=1.75748767956681x31=79.7604098082138x31=−3.97400948361753x31=27.2863953811205x31=82.2044467599582x31=−15.3508947858058x31=11.0691206807264x31=−15.7549206941732x31=47.2616324020612x31=46.1858745664205x31=−33.8628507747295x31=−46.928316630699x31=−1.78948236293348x31=−65.5808461895275x31=−51.1560410192306x31=36.7972126661047x31=3.95230187084535x31=85.4278345722129x31=48.1833155017359x31=78.44981619248x31=−72.106467795218x31=−11.621672446497x31=−40.1453184602676x31=−17.9879387647864x31=−14.0683294162172x31=−22.0673844234238x31=94.1405234555763x31=31.2578168207404x31=−49.2792605670951x31=−55.8533314248926x31=57.7341585233858x31=−95.8600997718734Decrece en los intervalos
[99.6364875148062,∞)Crece en los intervalos
(−∞,−99.1940994186411]