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VCE Stuff => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Mathematics => Topic started by: Roflmao on September 25, 2008, 10:54:39 pm

Title: Surface Area of y=x^3 + 4x
Post by: Roflmao on September 25, 2008, 10:54:39 pm
I'm finding the surface area of the graph (http://www.mathhelpforum.com/math-help/latex2/img/733adaa90ca0fc23db5408d40cecb233-1.gif)

with the equation for surface area, my work so far is...

(http://www.mathhelpforum.com/math-help/latex2/img/c31f93d186ca92d276174420162be2df-1.gif)

arithmetic....

(http://www.mathhelpforum.com/math-help/latex2/img/bd0277709184245a0ba39529865aaa37-1.gif)

decided that u-sub is the best way to go so...

(http://www.mathhelpforum.com/math-help/latex2/img/5bbbdba3578656bee9e27edf06a53e27-1.gif)

so the (http://www.mathhelpforum.com/math-help/latex2/img/c31a615c59fc69e92fd614eda125b717-1.gif) is messing me up right now. what do i need to do to make it go away/cancel out/whatever??
Title: Re: Surface Area of y=x^3 + 4x
Post by: Flaming_Arrow on September 25, 2008, 10:56:05 pm
wtfff man
you do this stuff and your in grade 4?
im in yr 11 and still haven't done this
Title: Re: Surface Area of y=x^3 + 4x
Post by: excal on September 25, 2008, 10:58:23 pm
I'm finding the surface area of the graph (http://www.mathhelpforum.com/math-help/latex2/img/733adaa90ca0fc23db5408d40cecb233-1.gif)

with the equation for surface area, my work so far is...

(http://www.mathhelpforum.com/math-help/latex2/img/c31f93d186ca92d276174420162be2df-1.gif)

arithmetic....

(http://www.mathhelpforum.com/math-help/latex2/img/bd0277709184245a0ba39529865aaa37-1.gif)

decided that u-sub is the best way to go so...

(http://www.mathhelpforum.com/math-help/latex2/img/5bbbdba3578656bee9e27edf06a53e27-1.gif)

so the (http://www.mathhelpforum.com/math-help/latex2/img/c31a615c59fc69e92fd614eda125b717-1.gif) is messing me up right now. what do i need to do to make it go away/cancel out/whatever??


http://www.mathhelpforum.com/math-help/latex2/img/c31a615c59fc69e92fd614eda125b717-1.gif ?
Title: Re: Surface Area of y=x^3 + 4x
Post by: Roflmao on September 25, 2008, 10:59:35 pm
Yea?
Title: Re: Surface Area of y=x^3 + 4x
Post by: cara.mel on September 25, 2008, 11:00:49 pm
http://www.mathhelpforum.com/math-help/calculus/50538-surface-area-y-x-3-4x.html
Title: Re: Surface Area of y=x^3 + 4x
Post by: Flaming_Arrow on September 25, 2008, 11:01:40 pm
dude
stop posting questions from other sites......
Title: Re: Surface Area of y=x^3 + 4x
Post by: excal on September 25, 2008, 11:03:03 pm
Will you stop it with the copy pasting?
Title: Re: Surface Area of y=x^3 + 4x
Post by: doboman on September 25, 2008, 11:03:19 pm
Is it me, or does this kid provide good humor?
Title: Re: Surface Area of y=x^3 + 4x
Post by: hard on September 26, 2008, 12:01:54 am
i think this kid has some grudge that he has to live up to his brother's standards. Well if that's how it is, do it through hard work, not through copying and pasting pretending to look smart, not saying you aren't, but don't go too far that you seem to have the perception that posting difficult questions makes you look like a genius. I'm not too sure many grade 4 students know the meaning of many of those symbols used let alone the fricken equation. dude i don't think even terrence tao did these in grade four.
Title: Re: Surface Area of y=x^3 + 4x
Post by: psychlaw on September 26, 2008, 12:02:16 am
Is it me, or does this kid provide good humor?
LOL
good humour
hahaha so it wasn't him doing the maths, he just posted other peoples questions on here too make it look like he was doing hard maths??
haha that is hilarious
Title: Re: Surface Area of y=x^3 + 4x
Post by: vce01 on September 26, 2008, 12:10:51 am
roflmao

no, im not referring to the OP
Title: Re: Surface Area of y=x^3 + 4x
Post by: /0 on September 26, 2008, 12:29:50 am
lol khalid

XD
Title: Re: Surface Area of y=x^3 + 4x
Post by: Ahmad on September 26, 2008, 01:17:19 am
dude i don't think even terrence tao did these in grade four.

It'd be a misnomer to say grade four when referring to Terence Tao, since he was doing year 10 work when he was like 8 (?). By the time he was 10 he participated in the IMO, which has significantly harder questions than this one.

http://en.wikipedia.org/wiki/Terence_tao#Child_prodigy

"Tao was the youngest participant to date in the International Mathematical Olympiad, first competing at the age of ten, winning a bronze, silver, and gold medal respectively. He won the gold medal when he just turned thirteen and remains the youngest gold medallist in the tournament's history."
Title: Re: Surface Area of y=x^3 + 4x
Post by: excal on September 26, 2008, 03:53:34 am
dude i don't think even terrence tao did these in grade four.

It'd be a misnomer to say grade four when referring to Terence Tao, since he was doing year 10 work when he was like 8 (?). By the time he was 10 he participated in the IMO, which has significantly harder questions than this one.

http://en.wikipedia.org/wiki/Terence_tao#Child_prodigy

"Tao was the youngest participant to date in the International Mathematical Olympiad, first competing at the age of ten, winning a bronze, silver, and gold medal respectively. He won the gold medal when he just turned thirteen and remains the youngest gold medallist in the tournament's history."

But, Ahmad, can you honestly describe your brother as being of like ability?
Title: Re: Surface Area of y=x^3 + 4x
Post by: RD on September 26, 2008, 02:32:24 pm
lol khalid's funny.
wtfff man
you do this stuff and your in grade 4?
im in yr 11 and still haven't done this
I'm in year 12 and I havnt done this :P (Further ftw)
Title: Re: Surface Area of y=x^3 + 4x
Post by: Glockmeister on September 26, 2008, 02:51:13 pm
Methods kids wouldn't have done this either.
Title: Re: Surface Area of y=x^3 + 4x
Post by: bturville on September 26, 2008, 03:02:18 pm
its uni math.
Title: Re: Surface Area of y=x^3 + 4x
Post by: Mao on September 26, 2008, 03:07:14 pm
I'm not even sure if it is within the scope of first year...

surface area of solids of rev involves line integrals... which we barely covered in MUEP =\

watch, he'll pull out a double integral next.
Title: Re: Surface Area of y=x^3 + 4x
Post by: cara.mel on September 26, 2008, 03:08:39 pm
whats a line integral? :P
Title: Re: Surface Area of y=x^3 + 4x
Post by: RD on September 26, 2008, 03:09:49 pm
I wonder if Ahmad can solve it.. hell, I know he can!
Title: Re: Surface Area of y=x^3 + 4x
Post by: humph on September 26, 2008, 04:10:25 pm
I'm not even sure if it is within the scope of first year...

surface area of solids of rev involves line integrals... which we barely covered in MUEP =\

watch, he'll pull out a double integral next.
? It was in the UMEP syllabus back in '06, don't know if it still is since they changed it... Mind you, we did them a different way not involving line integrals.
Actually, I can't remember exactly how we did do them...

And line integrals are ridiculously easy (and look kinda cool, especially surface integrals = circle around a double integral).
Title: Re: Surface Area of y=x^3 + 4x
Post by: ReVeL on September 26, 2008, 05:00:10 pm
Hahaha this kid is effin hilarious. You'd think he'd make it abit more believable than asking a uni style maths question when he's in grade 4.

Keep them coming kid!