# Calculus ?

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 !

## Answers and Replies

HallsofIvy
Homework Helper
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 !
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.

:s ok dats rudE !

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.

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

symbolipoint
Homework Helper