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Calculus ?

  1. Aug 11, 2009 #1
    ok I wanna clear my broad views upon calculus..
    first of all I wuz taught calculus 2-3 years back with differentials and Integration.. and ever since iam not really interested in doing this because I wanna know wot iam doing ? I wanna know how do they occur naturally ? I mean like i know if there is a equation like 3x+4y I wud differentiate subtracting one from the variables and multiplying their power with coefficients.. now iam doing BE Telecommunication, 2nd year, 4 semester, In our semester we have a subject thats related to maths and we do differentiate and integrate in those subjects.. but iam still not able to get the perspective ?
    like right now we are studying about cylindrical and spherical coordinates, I understood that in cylindrical coordinates fy is the ground distance covered by the point to the rectangular x axis and p and z blah..
    I wanna get to the main point
    that is..
    I came across this formula..
    thats the formula for surface element
    and that is S=pdfy dz
    I hope ur getting the formula ?
    it was also depicted in the book with the help of a diagram ? but I didnt really get it..
    there were these differential areas.. what are those?
    we got through a problem in which we had to find volume and surface.. we used differntials and integrals using limits..
    I just want to know what differentials and integrals are all about ?
    I mean a practical example ? like whats differentials are integrals in nature? where do they exist? I want an example like if we write apple then yea an apple comes to our mind.. like whats the shape and color.. can I get such an example for differentials and Integrals ?
    I really wanna make myself clear on these two topics.. because I guess every application uses these two methods... and I never knew why do they always come in the middle.. and I hate it when I dont know anything abt it.. I just dont like adding and subtracting things like a dumb... and yea I may sound like a dumbster.. but can any one plz give me a huge lecture or explaination regarding differentials and integrals ? I would be really glad if so.. plz help me !
     
  2. jcsd
  3. Aug 11, 2009 #2

    HallsofIvy

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    I would suggest you take a good course in Calculus since it appears you did not actually learn anything in the course you took "2-3 years back".

    Oh, and a good English course would help also.
     
  4. Aug 12, 2009 #3
    :s ok dats rudE !
     
  5. Aug 12, 2009 #4
    No, "dats" not rude for HallsofIvy to point out that your post was nearly incomprehensible. Why should anyone bother giving you a "huge lecture regarding differentials and integrals" if you can't be bothered to make a coherent post? That said, the advice above is correct. If you really lack a fundamental understanding of the basic concepts of Calculus, it would be in your best interest to take the class again. If that isn't an option, a book like Morris Kline's "Calculus: An Intuitive and Physical Approach" might give you the specific type of understanding you're looking for.
     
  6. Aug 12, 2009 #5
    ahan well :)
    Iam not totally dumb.. as you probably might'eve figured out from my posts.. but actually I wanna learn more and more.. whatever we do.. whether they r derivations or laplace, we always come across integrals and differentials.. and I do solve them on my own.. but I dont really get the point ? seriously.. I just wonder why do they always come in the middle ? I probably have to read more yea thats right... but in this forum there are many people.. can even greatest minds.. would they help me out ? a teacher is always better than studying alone thats what I think..
    that for the replies anyways :s
     
  7. Aug 13, 2009 #6

    symbolipoint

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    DeViLDuD3 -
    You did not learn Calculus, two to three years back. Your first question and discussion on this topic indicates this. You may have studied, but you did not learn. The best action is to study Calculus again, doing this yourself from a good college level Calculus book.
    ... Even if you did study Calculus a few years ago, having stayed away from it since then gives abundant opportunity to forget almost everything you knew.
     
  8. Aug 14, 2009 #7

    berkeman

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    Staff: Mentor

    DeViLDuD3 and I have had a discussion via PM. I'd normally go back and clean up his posts to try to make them intelligible, but that's too much work at this point. He should hopefully come back and try to do a better job of posting now...
     
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