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Mathematics 13 Online
OpenStudy (anonymous):

hat's the flux of the vector field F(x,y,z) = (e^-y) i - (y) j + (x sinz) k across σ with outward orientation where σ is the portion of the elliptic cylinder r(u,v) = (2cos v) i + (sin v) j + (u) k with 0 ≤ u ≤ 5, 0 ≤ v ≤ 2pi???? Hard Calculas

OpenStudy (anonymous):

whats*

OpenStudy (perl):

how did you go from factoring to this?

OpenStudy (anonymous):

im doing both and this the question im being asked

OpenStudy (perl):

youre doing algebra and multivariable calculus?

OpenStudy (anonymous):

yes

OpenStudy (perl):

this one is challenging :)

OpenStudy (anonymous):

I know

OpenStudy (perl):

do you know what a vector field is*

OpenStudy (anonymous):

every point in the subset

OpenStudy (perl):

ok lets see, whats the derivative of x^2

OpenStudy (perl):

im trying to get an idea of what you know, then i can start from there

OpenStudy (anonymous):

Ok then its 1/2

OpenStudy (perl):

the derivative of x^2 is 2x

OpenStudy (anonymous):

How is it 2x explain please

OpenStudy (perl):

ok one moment. I'm wondering, how did you end up taking multivariable calculus and algebra at the same time? to do multivariable calculus you need algebra 2, then pre-calculus, then calculus 1,2, (well i guess you can skip pre-calc)

OpenStudy (perl):

you can skip algebra 1, and go to algebra 2. algebra 2 covers algebra 1. or better yet , take college algebra , thats a good start

OpenStudy (anonymous):

i did algebra 2 and pre calc and i did bussiness math too

OpenStudy (perl):

you need to know derivatives (and integrals) to find the flux of a vector field

OpenStudy (perl):

ok so the algebra is just a refresher

OpenStudy (anonymous):

yes

OpenStudy (perl):

ok, and is this an online class?

OpenStudy (perl):

im going to work on your question, ill be back later . i have to read my calculus book ,

OpenStudy (anonymous):

okay

OpenStudy (perl):

are these multiple choice questions?

OpenStudy (perl):

do you have the multiple choice answers (that will help me)

OpenStudy (anonymous):

No this isnt multiple choice

OpenStudy (perl):

aww, its going to be harder :)

OpenStudy (perl):

im also watching khanacademy videos on this, so i think i will be able to answer it soon

OpenStudy (anonymous):

Okay No worries Ill be here

OpenStudy (anonymous):

is it an electromagnetics problem

OpenStudy (anonymous):

No i dont think so

OpenStudy (anonymous):

this question is too hard i quit

OpenStudy (anonymous):

i'll come up with an answer later

OpenStudy (anonymous):

to solve this first u need to learn how to double or triple integrate plus how to find the gradient of a vector ! and also must know about divergence theorem and Gauss's law for flux. so I guess u better to take a complete course of multivariable calculus. :)

OpenStudy (anonymous):

I can recommend a book :University Calculus by George B. Thomas Which in my opinion is the best book for calculus of all time ! BTW I can give u the pdf version

OpenStudy (anonymous):

Yeah can i have the pdf version thank you

OpenStudy (anonymous):

@avrillavigne

OpenStudy (anonymous):

I need ur email address for that ! I can't attach the file here. send me an email I will respond as soon as I can :padariam@gmail.com

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