The Fundamental Theorem of Calculus: Redefining Integration

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  • เผยแพร่เมื่อ 22 เม.ย. 2018
  • So we know a lot about differentiation, and the basics about what integration is, so what do these two operations have to do with one another? Everything! And the discovery of their relationship is what launched modern calculus, back in the time of Newton and pals. Check it out!
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ความคิดเห็น • 150

  • @thomasjohnson1959
    @thomasjohnson1959 3 ปีที่แล้ว +311

    I am 72 years old and enjoy substituting in high school science and math classes. I am in the process of teaching myself calculus. I have an appreciation of limits and derivatives but want to understand how and why integration works. Every video I have watched (and I have watched plenty) showed how to perform integration but none in a manner that made me feel that I really understood the concept. This is the best explanation I have seen thus far. Math books labor over formulas and some videos seem to want you to accept the concept because it is so. The implication being, if you do not understand, it is because you are either not trying hard enough or just not bright enough. This video really want us to understand integration. Thank you. For those still struggling with it, relax and do not stress. Watch it again, in a couple of days. Your subconscious mind will work on it, in between views. If a 72 year old can get it, you can too.

  • @Nathan-ix9ov

    Still hate Newton lol

  • @KenSchwartzMath
    @KenSchwartzMath 6 ปีที่แล้ว +107

    The "dx" actually does have a purpose. It is delta-x from the summation, in the limit as n -> infinity. It is the "width" of a "slice" of the region under the curve, which when multiplied by f(x), the "height", gives us the area of the slice.

  • @SENA2100
    @SENA2100 5 ปีที่แล้ว +51

    Yes but why does the antidervitive gives you the area under the curve

  • @benno19891
    @benno19891 ปีที่แล้ว +1

    This is one of those videos where it just snaps into place in your brain, "I understand calculus". Officially feel like neo when he said " I know kung-fu".

  • @adleneboulebtateche156
    @adleneboulebtateche156 4 ปีที่แล้ว +74

    I can't thank you enough for your colossal contribuation to my understanding of maths and physics. I'm a medicine doctor but I'm fascinated by physics and chemistry. I've read a dozen books about physics but the authors focused on the equations and the formulas rather than the phenomena themselves. Your videos are way better. Thank you again.

  • @AlexanderSchwarz-ck3cx

    So many people told me calculus was hell and hard. But since this is extremly easy for me, it must be the great teacher dave

  • @andrewhagstrom7842
    @andrewhagstrom7842 4 ปีที่แล้ว +17

    dx does have a meaning! It means "a little bit of x" as change in x approaches 0. It is the width of the rectangle. Now, dy/dx = f(x), so dy=f(x)dx. The Sum (integral) of dy, then, is the Sum (integral) of f(x)dx, which equals y + C.

  • @aselim20.

    I watched it.

  • @mbinghamworks146
    @mbinghamworks146 ปีที่แล้ว

    Thank you for focusing on the “why” in this video. The formulas are great and all, but if you don’t understand why you are using them, they are practically useless.

  • @derrickwright6450
    @derrickwright6450 2 ปีที่แล้ว +8

    Accepting an idea that I don't actually understand is stress.

  • @apostolosfilippos
    @apostolosfilippos 2 ปีที่แล้ว +8

    We are the same age more or less. I studied electronics engineering while hated math all my life. Just decided to binge watch all math from start to finish. With a different viewpoint and mostly with this amazing presentation, calm voice, would love it as should. Thanks for the inspiration.

  • @muffledd

    Watched a 2 hour lecture on this, did not understand a single thing. Watched 9 minutes of this video and it instantly cleared up the doubts I had. Thank you!

  • @NopeChuckTesla
    @NopeChuckTesla 5 ปีที่แล้ว +40

    I cannot even begin to express how thankful I am to have you as a resource, it feels good to actually understand something. Thanks for doing what you do, Prof Dave!

  • @jmt6137
    @jmt6137 3 ปีที่แล้ว +1

    Can't thank you enough . I've spent entire days trying to self study and search online explanations but you're video explained everything in less than 20mins

  • @Teddy_on_yt
    @Teddy_on_yt 2 ปีที่แล้ว +2

    If you are a varsity student like me and the textbooks and lectures weren't helping so youtube brought you here, you are safe, just continue watching the series. Thank you Dave.

  • @papermario2169
    @papermario2169 6 ปีที่แล้ว +5

    Will need this for next semester when I take Calc! Good stuff as always

  • @samuelcabzki8187
    @samuelcabzki8187 3 ปีที่แล้ว +2

    So clear and simple

  • @hamidalrawi2204
    @hamidalrawi2204 5 ปีที่แล้ว

    very clear and straight to the point, thank you !

  • @theburgerbrains
    @theburgerbrains 6 ปีที่แล้ว +2

    <3 you're posting these videos just in time for my quizzes and tests thank you so much, I feel like this kind of stuff can be so overwhelming