math1001: differential calculus (1 Viewer)

[Winston]

im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail im gonna fail im gonan fail im gonna fail !!!!!!!!!!!!!!!!!!!!!!!

 

[tooheyz]

ROLF winston mate calm down!!

ur not gonna fail

 

[Winston]

yes i am!

 

[Carlito]

lol Winston i feel the same way hahah, but on the positive side i think i worked out the ellipse thing for question 1.a.i.

 

[Winston]

Originally posted by Carlito
lol Winston i feel the same way hahah, but on the positive side i think i worked out the ellipse thing for question 1.a.i.

really and after working out the equation wat do u do with it? :S..

 

[Wyvern]

Originally posted by Winston
really and after working out the equation wat do u do with it? :S..

once you get it into the ellipse equation form you sub in 0, 1 and 2 for z and then draw each one on the x,y axis

 

[Winston]

Originally posted by Wyvern
once you get it into the ellipse equation form you sub in 0, 1 and 2 for z and then draw each one on the x,y axis

i dont get how u would draw it, u dont have the values for x and y :S... im lost...

 

[Wyvern]

x and y would give you specific points..........maybe this will help

http://www.largo-hs.pinellas.k12.fl.us/pease/ellipses.htm

 

[Winston]

hmm i fink i get it
then how do u do part ii and part iii?

 

[tooheyz]

winston, just come and see me man.
its easier, too hard on the net.

 

[Wyvern]

Originally posted by Winston
hmm i fink i get it
then how do u do part ii and part iii?

thats what im trying to find out lol

part ii you have to draw it 2 dimensional and i got no idea

 

[Winston]

Originally posted by Wyvern
thats what im trying to find out lol

part ii you have to draw it 2 dimensional and i got no idea

hey check ur PM i just need to confirm if i got the equation right

 

[Carlito]

its (x-1)^2 and (y-3)^2 so that means its centre is 1,3 doesnt it?

 

[tooheyz]

Originally posted by Carlito
its (x-1)^2 and (y-3)^2 so that means its centre is 1,3 doesnt it?

yes. for part ii, u just use the level curves u just drew to draw the 3d graph..

 

[Winston]

for part a i

if we sub in z = 0 we'll have a^2 = 4 and b^2 = 16

do we square root them to get a and b?

and how do we know which side it goes, is the longer part going up or going sideways?

 

[Carlito]

Originally posted by Winston
for part a i

if we sub in z = 0 we'll have a^2 = 4 and b^2 = 16

do we square root them to get a and b?

and how do we know which side it goes, is the longer part going up or going sideways?

yeah tahts what i did anyway, not sure if its right. it turned out 8 units high by 4 units wide i think.... as i said not sure, i havnt drawn it yet lol, only a draft sketch

 

[Wyvern]

how do we transform it into a 2d graph though?

 

[Wyvern]

winston, B is how much you go up/down
A is how much you go left/right

 

[Winston]

hmmm this is strange Wyvern, im getting like -5 for a^2 when z = 3 and -20 for b^2 :S

 

[tooheyz]

Originally posted by Wyvern
winston, B is how much you go up/down
A is how much you go left/right

a is the 'x' axis and b is the 'y' axis

think of it that way...

Originally posted by Carlito
yeah tahts what i did anyway, not sure if its right. it turned out 8 units high by 4 units wide i think.... as i said not sure, i havnt drawn it yet lol, only a draft sketch

u should get ellpises