math 1002: linear algebra (3 Viewers)

[Wyvern]

Originally posted by JUB JUB
use ur answers from 2ii...think...units squared and triangles....hmmmm

im not even sure if my 2ii is correct

 

[JUB JUB]

well ur answers should be opposite ...that is if mine's correct....argh just wait till u get to question 2!

 

[Saul]

ahem

AP^2 = (a^2 + b^2 - 2 a.b)/4

CP^2 = (a^2 + b^2 +2 a.b)/4

if its a right triangle, a.b goes to zero, and AP^2= CP^2 = BP^2 (BP cause AP = BP) therefore all the vertices are equidistant from the midpoint of the hypotenuse.

 

[Wyvern]

does anyone still need help with ii) c)? I think i got the right answer

 

[JUB JUB]

nooooooooooo 2iv....come on ppl

omg i have finally reached 101 posts.....how embarassing

 

[Saul]

for 2) iv) just find the plane that goes through C perpendicular to 'l' and equate it with the plane p, and you'll get a line of solutions

 

[JUB JUB]

Originally posted by Saul
ahem

AP^2 = (a^2 + b^2 - 2 a.b)/4

CP^2 = (a^2 + b^2 +2 a.b)/4

if its a right triangle, a.b goes to zero, and AP^2= CP^2 = BP^2 (BP cause AP = BP) therefore all the vertices are equidistant from the midpoint of the hypotenuse.

can u do 2 iv? or tell me how

 

[JUB JUB]

Originally posted by Saul
for 2) iv) just find the plane that goes through C perpendicular to 'l' and equate it with the plane p, and you'll get a line of solutions

yeh how do i do that? gimme something to start with
=)

 

[Carlito]

2iii anyone?

 

[Saul]

to find the plane, all you need is a point on the plane and a vector perpendicular
any line on l is perpendicular, so take AB or AC or some such thing

edit: use C as the point on the plane

 

[JUB JUB]

i think i've done this and it was wrong

 

[Carlito]

is 3x +3y +2z = -3 the plane?

im thinking its totally wrong

 

[KeypadSDM]

So how's the maths going guys?

 

[Carlito]

Keypad help us PLEASE!!!!! lol

 

[JUB JUB]

GIVE HIM THE ASSIGNMENT, dammit

 

[Carlito]

Originally posted by Carlito
pls pls pls i need help

Can anyone help me with parts (b) and (c) of this question:

and parts (iii) and (iv) of this question:

 

[Wyvern]

particularly 2 iii) and 2 iv...........i mean WTF

 

[JUB JUB]

Originally posted by Wyvern
particularly 2 iii) and 2 iv...........i mean WTF

i concur

why is there silence....noooooo

 

[KeypadSDM]

Insight with the AP^2

Use the cos rule.

 

[JUB JUB]

i tried to find a plane with c but it looks so wrong....what eqaution do i use with it exactly? i'm tired