In order to find the extrema, we need to solve the equation
dxdf(x)=0(the derivative equals zero),
and the roots of this equation are the extrema of this function:
dxdf(x)=the first derivative5⋅2acot(x)cos(5x)−x2+12acot(x)log(2)sin(5x)=0Solve this equationThe roots of this equation
x1=12.2520278702219x2=−19.792104315915x3=14.1370289022608x4=−7.85442388901902x5=81.9955641354391x6=−70.0575218229581x7=21.0486083395372x8=−71.9424771230855x9=34.243336299603x10=−60.0044273819258x11=76.3406967256093x12=−43.6681524169898x13=36.1282942907824x14=2.19434789945819x15=4.08250110523468x16=48.066355604513x17=7.22514196736028x18=24.1902161322856x19=−50.5796525561773x20=54.3495435239968x21=−103.358400898199x22=−61.8893825124058x23=56.2344997344481x24=88.9070685894122x25=−29.8451613012199x26=−38.0132902824965x27=−14.137304974683x28=39.8982092943127x29=−95.8185789540142x30=0.288704878724942x31=92.0486614782868x32=93.9336172004219x33=−36.128336741733x34=80.1106083469975x35=46.1813990136254x36=−11.624096505875x37=65.0309613747656x38=41.7831664206562x39=78.2256525441992x40=−21.6770481889691x41=−39.8982441068377x42=5.9682689261015x43=−49.9513342996013x44=−97.703534430795x45=−63.7743376832009x46=−9.73922648158337x47=−5.9697827840821x48=32.3583778776069x49=58.1194558857455x50=17.9069919293091x51=71.9424664113254x52=−92.0486680220746x53=100.216802889184x54=90.163705747916x55=−381.703507601456x56=−0.956925542610824x57=−53.7212439801803x58=−53.0929256780349x59=−69.4292033949059x60=−85.7654832117861x61=−73.8274324452886x62=−93.9336234842473x63=68.1725546184145x64=−26.0752597431184x65=16.0220149456067x66=83.8805199107995x67=−80.1106169860811x68=−16.0222301181307x69=49.9513120845443x70=26.0751783062182x71=−76.9690246922423x72=70.0575105271449x73=38.0132519343378x74=−65.6592928897506x75=−51.8362890989184x76=27.9601391966996x77=10.367000159236x78=−83.8805277908947x79=98.3318471901991x80=66.2875986823035x81=88.2787500085987x82=−87.6504386436056x83=−31.7301133125533x84=−75.7123877873973x85=−48.0663795953227x86=61.8893680390286x87=−81.9955723819473x88=−58.1194722970723x89=−41.7831981648082x90=22.3052522245671x91=72.5707850343669x92=44.2964422926316x93=−4.08563752177751x94=−27.9602100370195x95=−17.9071643199601x96=−33.6150659084925x97=60.0044119852004x98=−0.338901775254251The values of the extrema at the points:
(12.252027870221896, -1.05807215521277)
(-19.792104315915044, 0.965613425069861)
(14.13702890226082, 1.05016662476151)
(-7.854423889019023, -0.915962849245845)
(81.99556413543907, 1.00848888033338)
(-70.05752182295805, 0.990155476880893)
(21.04860833953717, -1.03345338269864)
(-71.9424771230855, -0.990412137904529)
(34.24333629960299, 1.02044219108894)
(-60.004427381925794, 0.988515919196205)
(76.34069672560932, -1.00912047570885)
(-43.66815241698978, 0.984254981133367)
(36.128294290782385, -1.01936594620173)
(2.194347899458193, -1.3446097808291)
(4.082501105234678, 1.18113485380654)
(48.066355604513014, 1.01452299791628)
(7.225141967360282, -1.10001785215559)
(24.190216132285567, 1.02905169778141)
(-50.57965255617731, -0.986391161113446)
(54.349543523996836, 1.01283371940802)
(-103.35840089819906, -0.99331639538537)
(-61.88938251240584, -0.988863671662468)
(56.23449973444807, -1.01240097538847)
(88.90706858941216, -1.00782645016034)
(-29.84516130121995, 0.977051317723769)
(-38.01329028249655, -0.98193502580247)
(-14.137304974682984, -0.952230296384834)
(39.898209294312686, -1.01752097179299)
(-95.81857895401419, -0.9927924088039)
(0.288704878724942, 2.42505555198911)
(92.0486614782868, 1.00755835037893)
(93.9336172004219, -1.00740612914916)
(-36.128336741733015, 0.981001979700351)
(80.11060834699747, -1.00868946344935)
(46.18139901362537, -1.01512005004677)
(-11.624096505874975, -0.94225036255822)
(65.03096137476564, -1.01071488274638)
(41.78316642065618, 1.01672429070752)
(78.22565254419919, 1.00889975450513)
(-21.677048188969135, -0.968551641768527)
(-39.89824410683771, 0.982780734054391)
(5.968268926101499, -1.1219437698845)
(-49.95133429960127, 0.986221210678361)
(-97.70353443079502, 0.992930959572939)
(-63.77433768320094, 0.989190984254599)
(-9.739226481583373, 0.931533462178175)
(-5.969782784082104, 0.891323032921505)
(32.35837787760692, -1.02164505316667)
(58.11945588574545, 1.01199645997223)
(17.906991929309118, 1.03942526502092)
(71.94246641132544, 1.00968067983586)
(-92.04866802207461, -0.992498349987912)
(100.21680288918364, -1.00694021952127)
(90.16370574791597, -1.00771695995662)
(-381.7035076014561, 0.99818572108688)
(-0.9569255426108237, 0.569918099668127)
(-53.72124398018026, 0.987181687879379)
(-53.09292567803487, -0.987031015269614)
(-69.42920339490585, -0.990066842329396)
(-85.76548321178613, -0.991951043994481)
(-73.82743244528864, 0.990655756825763)
(-93.9336234842473, 0.992648318599545)
(68.17255461841451, 1.01021866807885)
(-26.075259743118448, 0.973780304431222)
(16.022014945606745, -1.04415295032884)
(83.88051991079955, -1.008297348118)
(-80.11061698608106, 0.991385393326929)
(-16.022230118130654, 0.957714374177887)
(49.95131208454428, -1.01397130000539)
(26.075178306218156, -1.02692572123226)
(-76.96902469224233, -0.99103539606095)
(70.05751052714491, -1.00994240212415)
(38.01325193433779, 1.01839733069293)
(-65.65929288975057, -0.989499607464085)
(-51.836289098918435, -0.98671878927279)
(27.96013919669959, 1.02508954569211)
(10.36700015923604, 1.06892544311491)
(-83.88052779089466, 0.991770931714354)
(98.33184719019911, 1.00707371920741)
(66.28759868230352, -1.01051072450733)
(88.2787500085987, 1.00788236863702)
(-87.65043864360563, 0.992123441171333)
(-31.73011331255335, -0.978398848786504)
(-75.7123877873973, -0.990887303041292)
(-48.066379595322694, -0.985684903793344)
(61.88936803902863, 1.01126174412703)
(-81.99557238194731, -0.991582574608515)
(-58.11947229707227, -0.988145750737867)
(-41.78319816480822, -0.983550816517019)
(22.30525222456711, -1.03154190750363)
(72.57078503436693, -1.00959647424186)
(44.29644229263163, 1.01576828779445)
(-4.085637521777506, -0.846695432297942)
(-27.960210037019475, -0.975524563260983)
(-17.90716431996009, -0.96207030884588)
(-33.615065908492504, 0.979596954857131)
(60.00441198520036, -1.01161749857782)
(-0.3389017752542513, -0.418961352736205)
Intervals of increase and decrease of the function:Let's find intervals where the function increases and decreases, as well as minima and maxima of the function, for this let's look how the function behaves itself in the extremas and at the slightest deviation from:
Minima of the function at points:
x1=12.2520278702219x2=−7.85442388901902x3=21.0486083395372x4=−71.9424771230855x5=76.3406967256093x6=36.1282942907824x7=2.19434789945819x8=7.22514196736028x9=−50.5796525561773x10=−103.358400898199x11=−61.8893825124058x12=56.2344997344481x13=88.9070685894122x14=−38.0132902824965x15=−14.137304974683x16=39.8982092943127x17=−95.8185789540142x18=93.9336172004219x19=80.1106083469975x20=46.1813990136254x21=−11.624096505875x22=65.0309613747656x23=−21.6770481889691x24=5.9682689261015x25=32.3583778776069x26=−92.0486680220746x27=100.216802889184x28=90.163705747916x29=−53.0929256780349x30=−69.4292033949059x31=−85.7654832117861x32=16.0220149456067x33=83.8805199107995x34=49.9513120845443x35=26.0751783062182x36=−76.9690246922423x37=70.0575105271449x38=−65.6592928897506x39=−51.8362890989184x40=66.2875986823035x41=−31.7301133125533x42=−75.7123877873973x43=−48.0663795953227x44=−81.9955723819473x45=−58.1194722970723x46=−41.7831981648082x47=22.3052522245671x48=72.5707850343669x49=−4.08563752177751x50=−27.9602100370195x51=−17.9071643199601x52=60.0044119852004x53=−0.338901775254251Maxima of the function at points:
x53=−19.792104315915x53=14.1370289022608x53=81.9955641354391x53=−70.0575218229581x53=34.243336299603x53=−60.0044273819258x53=−43.6681524169898x53=4.08250110523468x53=48.066355604513x53=24.1902161322856x53=54.3495435239968x53=−29.8451613012199x53=0.288704878724942x53=92.0486614782868x53=−36.128336741733x53=41.7831664206562x53=78.2256525441992x53=−39.8982441068377x53=−49.9513342996013x53=−97.703534430795x53=−63.7743376832009x53=−9.73922648158337x53=−5.9697827840821x53=58.1194558857455x53=17.9069919293091x53=71.9424664113254x53=−381.703507601456x53=−0.956925542610824x53=−53.7212439801803x53=−73.8274324452886x53=−93.9336234842473x53=68.1725546184145x53=−26.0752597431184x53=−80.1106169860811x53=−16.0222301181307x53=38.0132519343378x53=27.9601391966996x53=10.367000159236x53=−83.8805277908947x53=98.3318471901991x53=88.2787500085987x53=−87.6504386436056x53=61.8893680390286x53=44.2964422926316x53=−33.6150659084925Decreasing at intervals
[100.216802889184,∞)Increasing at intervals
(−∞,−103.358400898199]