Higher Order Derivatives

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  • เผยแพร่เมื่อ 2 พ.ย. 2024

ความคิดเห็น • 160

  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  ปีที่แล้ว +15

    Derivatives - Formula Sheet: bit.ly/4dThzf1
    Final Exams and Video Playlists: www.video-tutor.net/
    Next Video: th-cam.com/video/3lUOtjkqfQo/w-d-xo.html

  • @ivyvillamor8340
    @ivyvillamor8340 5 ปีที่แล้ว +329

    You've been helping me since my first year in college. Thanks man! You're a blessing from the heaven.

    • @sugeuare1500
      @sugeuare1500 3 ปีที่แล้ว +1

      Hi my major is computer engineering what is yours?

    • @kentenfaust3042
      @kentenfaust3042 3 ปีที่แล้ว +3

      I’ve started using his videos since senior year of high school.

    • @yashborate7965
      @yashborate7965 ปีที่แล้ว

      I love you 😍

    • @paulwilliams90
      @paulwilliams90 ปีที่แล้ว

      junior in high school im screwed.

    • @aarhonestcorner
      @aarhonestcorner ปีที่แล้ว

      @@paulwilliams90senior in high school. Were you here for a test like I am right now?

  • @ebukaeluzaiuduma3390
    @ebukaeluzaiuduma3390 2 ปีที่แล้ว +51

    Great teachers are not only high degree holders, they anyone who can simplify the most complex stuffs using unambiguous words to a dummy. Well done sir.

  • @yameteyamite5696
    @yameteyamite5696 3 ปีที่แล้ว +470

    The people who dislikes his videos were probably the university professor 's who didn't like teaching student the easy way.

    • @lourencediso1833
      @lourencediso1833 ปีที่แล้ว +5

      EURT

    • @maskedintrovert7853
      @maskedintrovert7853 ปีที่แล้ว +9

      What's the use of masters or doctorates if you can't clearly instruct students

    • @sudo2570
      @sudo2570 ปีที่แล้ว +9

      Our professor actually sends us this so we can further unserstand the topic

    • @lazlo686
      @lazlo686 ปีที่แล้ว +1

      I actually dislike this dude’s videos cuz of his voice and the fact that he doesn’t go over complicated problems. Like most of these are easy in this video.

    • @adamwightman5487
      @adamwightman5487 ปีที่แล้ว +5

      @@lazlo686 well it says in the description that it is only a basic introduction. He has full length videos if you pay and want to see more.

  • @kasandrahope437
    @kasandrahope437 5 ปีที่แล้ว +95

    you've taught me more than tutors or professors have

  • @ncthusiast2817
    @ncthusiast2817 4 ปีที่แล้ว +135

    me: *clicked this video*
    advertisement: "sTill sEarching oN youTube fOr mAth helP? aRe thOse videos frOm 2016 rEally helpinG?"
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    • @zaro12345678910
      @zaro12345678910 4 ปีที่แล้ว +14

      apperantly they do thou HAHAHAHAHAHA

    • @kylefrank638
      @kylefrank638 4 ปีที่แล้ว +19

      I know, every Calc channel I watch, they have these ads with people saying "YO, WANNA PAY FOR HELP INSTEAD OF WATCHING THIS FREE, COMPREHENSIBLE VIDEO??"

    • @ncthusiast2817
      @ncthusiast2817 4 ปีที่แล้ว +5

      @@zaro12345678910 yeah true actually i understand the lectures here in yt more than my teacher's discussion lol

    • @skair5425
      @skair5425 4 ปีที่แล้ว +7

      yes, I will pay for your product instead of the useful free content I'm already watching

    • @cosmax1448
      @cosmax1448 6 หลายเดือนก่อน

      I have the same add

  • @charleshudson5330
    @charleshudson5330 5 ปีที่แล้ว +12

    In Kinematics, the Third, Fourth, Fifth and Sixth derivatives have names. They are (seriously): Jerk, Jounce (also called Snap), Crackle and Pop. They are used by mechanical engineers in the design of cam shafts, railroad track curves, pistons, etc. Acceleration is never really instantaneous. Jerk is the time rate of change of acceleration, that is, the small change in inertia when a constant force is initially applied. Jerk is the time rate of change of Jounce. When you are riding in a car under 'constant' acceleration but over a rough surface, the acceleration is not really constant, but rapidly changing, producing Jerk. To get the smoothest ride on a roller coaster, or on a railroad curve, an engineer considers the Jerk and the Jounce. (Or Snap.) As for Crackle and Pop, they are less used, (if at all), but expressions of the reality that much of applied physics is idealized mechanics. I'm answering my own question, posed below:

  • @yrok244
    @yrok244 3 ปีที่แล้ว +14

    I'm a Sophomore in high school attempting my precalculus final, this saved my life!

  • @Quintessential.96
    @Quintessential.96 ปีที่แล้ว +1

    There is a saying when you have a knowledge and you dont share it with people...the knowledge you have will eventually go down but when you continue to share your knowledge with others definitely it will keep on rising. Thanks alot

  • @unzippedstraw8885
    @unzippedstraw8885 3 ปีที่แล้ว +18

    This man literally knows everything

  • @georgesadler7830
    @georgesadler7830 ปีที่แล้ว +1

    MR. Organic Chemistry Tutor, Thank you for an outstanding video/lecture on Higher Order Derivatives in Calculus.

  • @ryanm6004
    @ryanm6004 4 ปีที่แล้ว +9

    Man you’ve saved me so many times now. I still wanna go back in time and tell Isaac Newton to put it back though.

  • @sung5087
    @sung5087 6 ปีที่แล้ว +17

    best teacher in my life

  • @kulaypulaa7864
    @kulaypulaa7864 6 หลายเดือนก่อน

    This channel has been single handedly saving my ass from failing math and science subjects since junior high until now at college

  • @astron099
    @astron099 ปีที่แล้ว

    I'll be having a long quiz on derivatives in the next 6 hours and this really helped

  • @extremebass9195
    @extremebass9195 2 ปีที่แล้ว +4

    I learnt full derivatives from your videos thanks a lot sir

  • @FaiGal
    @FaiGal ปีที่แล้ว +2

    the only thing I don't understand is how I learn so much better from these tutorials than I do from the class I enrolled for

  • @pranithbhandary973
    @pranithbhandary973 2 ปีที่แล้ว +1

    i think this is great....the organic chemistry tutor teaching calculus

  • @mengeshaworkie6046
    @mengeshaworkie6046 ปีที่แล้ว

    I saw most of lecture video mainly physics and maths,I proud you what a presentation and presenter real amazing ❤❤❤

  • @BocchiRock420
    @BocchiRock420 20 วันที่ผ่านมา

    Thank you for the vids bro I'm definitely gonna cook this applied calculus long exam

  • @MewTCG1
    @MewTCG1 3 ปีที่แล้ว +6

    This man just sees numbers as a whole language wheres he fluent in every single form.

  • @josephjatto6759
    @josephjatto6759 4 ปีที่แล้ว +13

    Thanks and God bless you endlessly sir!

  • @rhisykangale3367
    @rhisykangale3367 ปีที่แล้ว +1

    You deserve a noble peace prize for your deeds💯

  • @benignosintrachitangua6939
    @benignosintrachitangua6939 2 ปีที่แล้ว +2

    Man, u’re helping so much… u doing great, appreciation and congrats…✊🏾

  • @arshbuilds
    @arshbuilds ปีที่แล้ว

    i just missed first 9 days of school and this is really helping me thanks bro very cool

  • @lemonymelony6883
    @lemonymelony6883 ปีที่แล้ว

    this man is basically my lifesaver... thank you so much!

  • @adeolajoy4539
    @adeolajoy4539 5 หลายเดือนก่อน

    You've taught more than my tutor

  • @thehap.y
    @thehap.y 2 ปีที่แล้ว +2

    now i will declare that calculus is fcking easyyyyy, depende talaga sa teacher

  • @alvinnaag6503
    @alvinnaag6503 3 ปีที่แล้ว +4

    I got a single formula for getting the higher order derivative during my college days. It can solve the 50th or 100th derivative at once.

  • @sm71485
    @sm71485 8 หลายเดือนก่อน

    This guy has saved thousands of degrees

  • @lourencediso1833
    @lourencediso1833 ปีที่แล้ว +4

    Sheesh your a legend bro thanks for teaching us GR 10

  • @francilynmalbas672
    @francilynmalbas672 27 วันที่ผ่านมา

    Happy Teacher's Day, Sir🥳❤️

  • @zora9135
    @zora9135 3 ปีที่แล้ว +1

    Salamat po sa inyong turo.
    At
    Shout out po sa mga kaklase kong pupunta sa video na to.
    -nite

  • @mlungisimkhize-ms6xy
    @mlungisimkhize-ms6xy 6 หลายเดือนก่อน

    you're the best in the world brohh🥳

  • @sofiafiorillo9851
    @sofiafiorillo9851 2 ปีที่แล้ว

    you're a simplifying machine! god bless your soul

  • @charleshudson5330
    @charleshudson5330 5 ปีที่แล้ว +14

    How about an explanation of the meaning of higher order derivatives. What they signify in a real problem. How they might be of practical use. For instance, in mechanics, the first derivative of distance is velocity. The second derivative of distance - or, that is, the first derivative of velocity - is acceleration. What next? Think about it.

  • @sydneypenrose9573
    @sydneypenrose9573 3 ปีที่แล้ว +1

    he's literally an angel, tysm OCT!!

  • @clarijoiceberi747
    @clarijoiceberi747 2 ปีที่แล้ว

    Thanks alot, you are a blessing to my future.

  • @hdefreedomspeaker8847
    @hdefreedomspeaker8847 2 ปีที่แล้ว

    When I finish my Diploma am going to make it my mission to come shake your hand 🤝❤️

  • @shaliniarya4112
    @shaliniarya4112 4 ปีที่แล้ว +4

    Too good man thanku so much for helping me

  • @FaithMkandawire-zv3wc
    @FaithMkandawire-zv3wc 6 หลายเดือนก่อน

    Thanks a lot you are really helping me

  • @adeolajoy4539
    @adeolajoy4539 5 หลายเดือนก่อน

    Thanks so much
    God bless you sir

  • @francismali5840
    @francismali5840 ปีที่แล้ว

    The big boy is heaven sent🔥❤️

  • @metawhirl4609
    @metawhirl4609 4 ปีที่แล้ว +3

    I searched for partial higher order derivatives but this is I have found only lol.

  • @justshan2413
    @justshan2413 4 ปีที่แล้ว +2

    Thank you so much, the video was helpful

  • @tumisangncube2862
    @tumisangncube2862 6 ปีที่แล้ว +4

    you are simply the best

  • @yaboigetthisbread3372
    @yaboigetthisbread3372 3 ปีที่แล้ว +11

    I honestly dont know why i pay for uni

  • @BenShMotoJIE
    @BenShMotoJIE 3 ปีที่แล้ว +1

    Nice video again 👍 keep it up

  • @fantasticsite408
    @fantasticsite408 5 วันที่ผ่านมา

    It helped alot❤

  • @ChristoffeBernardoSuizo
    @ChristoffeBernardoSuizo 23 วันที่ผ่านมา

    Can i ask a question, the example number 3 in getting the 3rd derivative of f(x) in the 3rd dx why did u rationalize it and didn’t rationalize the 2nd dx f(x)? It can be simplified also as 1/2•square root of x

  • @nihatdonmezov8354
    @nihatdonmezov8354 3 ปีที่แล้ว +3

    Thank u so much!!!

  • @fheightnight7092
    @fheightnight7092 ปีที่แล้ว +1

    you're better than my paid teachers lol

  • @jhunjusay888
    @jhunjusay888 ปีที่แล้ว

    Our prof is freaking crazy asking for 222nd derivative of sin5x

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      is there a formula to find the higher derivatives?

  • @ebrahimalbahdahi
    @ebrahimalbahdahi 4 ปีที่แล้ว +2

    You are the best man

  • @erlajade7696
    @erlajade7696 5 ปีที่แล้ว +2

    thank you so much. this means a lot to me

  • @vitaminprotein7119
    @vitaminprotein7119 3 ปีที่แล้ว +1

    Dislikers must be our school/ college teachers

  • @cubby091398
    @cubby091398 10 วันที่ผ่านมา

    What math is associated with higher order derivatives? Is it Calculus or Differential Equations.

  • @sackeyirene8796
    @sackeyirene8796 5 ปีที่แล้ว +3

    Thank you

  • @Apuotmachar
    @Apuotmachar ปีที่แล้ว +1

    Thanks 😊

  • @smohammed5596
    @smohammed5596 ปีที่แล้ว

    You are great i thank u alot

  • @aira4380
    @aira4380 4 ปีที่แล้ว +6

    Why can't I find any example of what my teacher's giving to us...

    • @Kekkndslgnlwnh
      @Kekkndslgnlwnh 4 ปีที่แล้ว +18

      same!!! annoying when the teachers only show easy ass examples and explain easy ones but then give super hard versions on the test or homework without explaining or teaching how

    • @ha-il9bd
      @ha-il9bd 4 ปีที่แล้ว +1

      @@Kekkndslgnlwnh exactly what my teacher does.

    • @kylefrank638
      @kylefrank638 4 ปีที่แล้ว

      I have one with three components being multiplied, not just two, wherein the Product Rule is easily applied..

    • @ashoktomar5958
      @ashoktomar5958 3 ปีที่แล้ว

      I can be your teacher
      😁👙

  • @artemkrazhan6778
    @artemkrazhan6778 3 ปีที่แล้ว

    awesome video

  • @i_am_dumb1070
    @i_am_dumb1070 3 ปีที่แล้ว +1

    People here writing on professor and university i am studying in class11 cmon guys...hod is easy i just came here for some brush up.

  • @Emgaeeeee
    @Emgaeeeee 4 ปีที่แล้ว +1

    still cant believe this our topic in 10th grade lmao

  • @zackviccaji6342
    @zackviccaji6342 5 ปีที่แล้ว +1

    You r the best!

  • @manyalkutinkoak929
    @manyalkutinkoak929 6 ปีที่แล้ว +1

    best teacher

  • @ujuuju4311
    @ujuuju4311 5 ปีที่แล้ว +2

    in 5:00 the answer should be 2cosx+4xsinx-x^2cosx right? those two -2xsinx will add up to +4xsinx correct me if im wrong

    • @taobao736
      @taobao736 4 ปีที่แล้ว

      ure not right ..tho I'm late -2-2=-4

    • @Holly26
      @Holly26 4 ปีที่แล้ว +1

      when you multiply -2 by -2 then you get +4 but when you add -2 and -2 you get -4 so The Organic Chemistry Tutor is correct

    • @vitaminprotein7119
      @vitaminprotein7119 3 ปีที่แล้ว

      TWICE add -2 = -4
      TWICE multiply -2 =+4

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      4 years later ur still wrong

    • @ujuuju4311
      @ujuuju4311 10 หลายเดือนก่อน

      @@babyshark8958 don't worry I figured it out long time ago 😂

  • @Informative229
    @Informative229 4 ปีที่แล้ว +2

    Best expression

  • @paulinetaylor2810
    @paulinetaylor2810 4 ปีที่แล้ว +2

    so in other words higher order derivatives, scond, third and fourth derivatives are like composite functions you are saying?

    • @tamago1704
      @tamago1704 3 ปีที่แล้ว

      it means its more difficult X'(

  • @Songvibez10146
    @Songvibez10146 ปีที่แล้ว

    I dont konw english but I can understand what you say you save me

  • @nicaangelacalma7114
    @nicaangelacalma7114 5 ปีที่แล้ว +5

    thank u!! ❤️

  • @lamasaleh5111
    @lamasaleh5111 6 ปีที่แล้ว +3

    What if we wanted to find derivative fiftieth for example? Are there any rules for this?

    • @justabunga1
      @justabunga1 5 ปีที่แล้ว +2

      There is some functions if you want to take many derivatives if you can. A good example would be y=2^x. The nth derivative of that function is y^(n)=2^x(ln(2))^n. The 50th derivative is y^(50)=2^x(ln(2))^50

    • @parultidkae4924
      @parultidkae4924 2 ปีที่แล้ว

      @@justabunga1 thanks

  • @Winterbass_12
    @Winterbass_12 2 ปีที่แล้ว +1

    I have a question..
    What will be the third derivative if the second derivative is a single number? Cuz in the second derivative i got +10, what will be the third one now??

    • @kunalkhare1706
      @kunalkhare1706 2 ปีที่แล้ว +1

      0 because 10 is constant

    • @lessthanpinochet
      @lessthanpinochet ปีที่แล้ว

      The derivative of a constant(single number) is always zero.

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      yeah i agree
      @@kunalkhare1706

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      yeah i agree
      @@lessthanpinochet

  • @NicKenMic
    @NicKenMic 6 หลายเดือนก่อน

    I LOVE YOUUUUUUUUUU

  • @sahilsolanki5437
    @sahilsolanki5437 4 ปีที่แล้ว

    Thanks for helping me.🙂🙂

  • @Animx185
    @Animx185 7 หลายเดือนก่อน

    1:25 can i do 60x³+ 12x
    60(3x²)+ 12(1) then
    180x² + 12
    180( 2x) + 12(0)
    360x
    360(1)
    360
    360(0)
    = 0
    😂😂 i try to do more if i am wrong you can right me

  • @mydepression5666
    @mydepression5666 4 ปีที่แล้ว +2

    Lesssgoooo miss anj

  • @1estel1ch.42
    @1estel1ch.42 4 ปีที่แล้ว +3

    man these are starting to get a LOT more tedious

  • @SN0WLF
    @SN0WLF ปีที่แล้ว +1

    4:10 the derivative of first part wouldn't it be 2 rather than 2x

  • @lambsauces
    @lambsauces 5 ปีที่แล้ว +1

    is it allowed to have a final answer in a certain derivative in which negative exponent is implied?

    • @igit7745
      @igit7745 4 ปีที่แล้ว +1

      I suggest you put it to fraction form.

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      yeah i agree
      @@igit7745

  • @afaqnaveed2602
    @afaqnaveed2602 5 ปีที่แล้ว +3

    what if we were told to find 56 derivative of function?

    • @Killuasama07
      @Killuasama07 5 ปีที่แล้ว +2

      There will always be a pattern. Usually the questions with the 56th derivative include sin or cos but if it were x^42, then we would know that the derivative would result in 0 because every time we took a derivative, the exponent got subtracted by 1

    • @abdallahsidhoum4931
      @abdallahsidhoum4931 5 ปีที่แล้ว

      use Leibniz nth derivative formula, d^n(f*g)/dx=sum of (n k)*f^(n-k) *g^k from k to n

    • @vitaminprotein7119
      @vitaminprotein7119 3 ปีที่แล้ว

      Do they ask like this too??

  • @lyricomanoban8851
    @lyricomanoban8851 4 ปีที่แล้ว +6

    hello guys, can someone explain to me why we need to multiply (-1) to ycos(xy) / 1-xcos (xy) on both numerator and denominator ? i hope someone help me with this one. 😅

    • @babyshark8958
      @babyshark8958 10 หลายเดือนก่อน

      do you still need help 3 years later?

  • @JhonzhenQuiñanola
    @JhonzhenQuiñanola 18 วันที่ผ่านมา

    At 5:00 isn't the answer should be 2cosx -4xsinx +x²cosx

  • @melaniesolis2324
    @melaniesolis2324 5 ปีที่แล้ว +1

    THANK UOU SOOO MUCH

  • @catherinemenes9069
    @catherinemenes9069 2 ปีที่แล้ว

    thankyouuu

  • @saifurrahman6972
    @saifurrahman6972 2 ปีที่แล้ว

    thank you again ;--;

  • @EcilPeralta-ys1lv
    @EcilPeralta-ys1lv ปีที่แล้ว

    thanks

  • @stan.newjeans
    @stan.newjeans 5 ปีที่แล้ว +1

    Im so confused about how to determine which rule should be used. Like product rule, quotient rule etc. Will someone tell me.

    • @noobkiller463
      @noobkiller463 5 ปีที่แล้ว +1

      Product rule for f(x) * g(x), quotient for f(x)/g(x)

    • @aam7486
      @aam7486 5 ปีที่แล้ว +2

      you use product rule when the question is in the form of brackets, ex: (a+b)(c+d) while for quotient you use it when there's a fraction

    • @tangtang8486
      @tangtang8486 5 ปีที่แล้ว +1

      Sometimes I just wing it and I end up stressing so much during tests so I write my name on the paper and hand it in without any answers filled (meanwhile its 5 minutes into the exam) every other student in my class stops and stares at me, while my teacher stops me and whispers "You didn't write anything on your exam...". So I tell him "Yeah, I don't know anything...". Even though he insists I try the problems for part marks, I tell him it would only make my situation worse. My life has become a huge fucking mess, I'm 28 and still in night school. My friends stopped talking to me, and every family member won't lend me any money over how much of a disgrace I am. If you're looking for a job in Vermont, I work at a KFC off the highway. Names Andy, please don't be like me.

    • @jodi-.-
      @jodi-.- 4 ปีที่แล้ว

      Tang Tang are you okay? I see you’re going through very tough times but now isn’t the time to give up!! Show the people who left you that you can make IT! At least you’re in school trying... that shows you made the first step to improving your life.

    • @lewise.4367
      @lewise.4367 4 ปีที่แล้ว +1

      @@tangtang8486 Hey dude, some part of your story really hit home. I'm dumb as hell and even passed a blank paper too. I'm younger than you tho, but nevertheless, you're still young too! This is a low point in your life right now, but I know you have it in you to push further and get back on your feet! I'm rooting for you dude, your life's not over yet. You can do this : )

  • @hanzjoshuadelatorre7256
    @hanzjoshuadelatorre7256 2 ปีที่แล้ว +2

    What would be the derivative of (ln) or (e)?

    • @parultidkae4924
      @parultidkae4924 2 ปีที่แล้ว +1

      there's no such thing as derviative of (ln) or (x) u prolly asked the wrong question or u're prolly confused

    • @JKMath
      @JKMath 2 ปีที่แล้ว

      The derivative of the natural log of x, or ln(x), would be 1/x. And the derivative of e^x is just the same thing, e^x. Those are some rules you learn later on in calculus. If you were asking about the number e and not the function e^x, then the derivative is just 0 since the number e is a constant and the derivative of any constant is just 0. Hope that helps!

  • @astro_nic
    @astro_nic 2 ปีที่แล้ว

    nice

  • @thatomofolo452
    @thatomofolo452 ปีที่แล้ว

    Cool 😎

  • @vichakshanawijayakumara4819
    @vichakshanawijayakumara4819 3 ปีที่แล้ว

    🙂🙂🙂

  • @mulekamp647
    @mulekamp647 3 หลายเดือนก่อน

    Cbu😂

  • @1nfuzion
    @1nfuzion 5 ปีที่แล้ว

    Why can't we use the quotient rule for the last problem at 9:10

    • @jacobmelendrez7174
      @jacobmelendrez7174 5 ปีที่แล้ว

      No x in the numerator

    • @braedenbertz1063
      @braedenbertz1063 5 ปีที่แล้ว +2

      Vauron I would like to point out that you CAN use the quotient rule to solve 5/(x^2). The quotient rule is: (LH’-HL’)/(L^2). I like to write my terms down so I will do that here: H = 5; H’ = d/dx 5 = 0; L = x^2; L’= d/dx x^2 = 2x. Now we substitute those values in to get: [(x^2 * 0) - (5 * 2x)] / (x^2)^2. Simplify: -10x/(x*x*x*x). We have an x on top and bottom so they are equal to one and cancel. We are then left with -10/x^3.
      The quotient rule is just a different way of writing the product rule and vice versa. Afaik, any equation that can be differentiated with the product rule can be differentiated with the quotient rule. Hope this helps! (Any questions or misplaced steps please tell me so I can help future people if they also have the same question)

    • @kelly1572
      @kelly1572 5 ปีที่แล้ว

      You can use quotient rule but it's going to be a longer method

    • @shaneconwell253
      @shaneconwell253 5 ปีที่แล้ว

      @@braedenbertz1063so the answer is wrong? his answer on the vid was 5x^-2. I also used the quotient rule and my answer is -10/x^3 .

    • @raulcondez397
      @raulcondez397 5 ปีที่แล้ว

      @@shaneconwell253 when he manipulate the expression is it already the second derivative?! 9;10 - 9;25

  • @newton6031
    @newton6031 3 ปีที่แล้ว +1

    Poorly presented

  • @mwon1673
    @mwon1673 7 หลายเดือนก่อน

    I hate calculus so much

  • @natepolidoro4565
    @natepolidoro4565 6 ปีที่แล้ว +1

    Khan academy

  • @sackeyirene8796
    @sackeyirene8796 5 ปีที่แล้ว +1

    Thank you