The Student Room Group
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>

This discussion is now closed.

Check out other Related discussions

vectors p6

Scroll to see replies

Reply 20
Avatar for Juwel
Juwel
18
You could try getting three simultaneous equations in lambda and then eliminating lambda?

EDIT: that might not work, the line is perpendicular to the plane...
Reply 21
Avatar for chetan
chetan
hm sorry i was dotting it with the point rather than the purpledracula
Reply 22
Avatar for kriztinae
kriztinae
OP
14
honestly id stay stop wasting your time trying to work it out, this specific question wont come up. go revise! we have tried god knows we havE!
Reply 23
Avatar for kriztinae
kriztinae
OP
14
ZJuwelH
You could try getting three simultaneous equations in lambda and then eliminating lambda?

EDIT: that might not work, the line is perpendicular to the plane...

in the markscheme they just state the normal as -i + 5j + 3k
then the rest is fine i just dont know how to find the normal!
Reply 24
Avatar for chandoug
chandoug
kriztinae
in the markscheme they just state the normal as -i + 5j + 3k
then the rest is fine i just dont know how to find the normal!


plz check that q again i swear u have misread it, either that or your copy of jun03 is misprinted

btw a normal is a line perpendicular to another line (p1 knowledge) and was given in the question,
Reply 25
Avatar for Fermat
Fermat
8
kriztinae
in the markscheme they just state the normal as -i + 5j + 3k
then the rest is fine i just dont know how to find the normal!

If you have a plane described as,

ax + by + cz = d

then the normal to that plane is given by,

(a,b,c)
Reply 26
Avatar for kriztinae
kriztinae
OP
14
chandoug
plz check that q again i swear u have misread it, either that or your copy of jun03 is misprinted

btw a normal is a line perpendicular to another line (p1 knowledge) and was given in the question,

just for you im going to rewrite the question!!

the plane P1 passes through the point with position vector i + 2j - k, and is perpendicular to the line L with equation r = 3i - 2k + (lamtha)(-i + 2j +3k)

a) show that the cartesian equation of P1 is x - 5y - 3z = -6

thats it!
Reply 27
Avatar for Cille
Cille
3
just for you im going to rewrite the question!!

the plane P1 passes through the point with position vector i + 2j - k, and is perpendicular to the line L with equation r = 3i - 2k + (lamtha)(-i + 2j +3k)

a) show that the cartesian equation of P1 is x - 5y - 3z = -6

thats it!


I'm afraid, kriztinae, that's not it!
Squishy's concerns are correct.
I have the paper in front of me and the equation of the line is:

r = 3i - 2k + lamda(-i + 5j + 3k).
Reply 28
Avatar for kriztinae
kriztinae
OP
14
nollaig
I'm afraid, kriztinae, that's not it!
Squishy's concerns are correct.
I have the paper in front of me and the equation of the line is:

r = 3i - 2k + lamda(-i + 5j + 3k).

have we got the same paper??

i got june 2003?
i swear thats whats written!!! but yea it makes much more sence your way! argg
Reply 29
Avatar for Cille
Cille
3
I've got an actual copy of the exam paper.[Given to me just after last summer's exam - safer to clarify this!!]

You could, in good faith, have a copy of a paper with a misprint.

Here's how:

Many schools use copies of papers distributed electronically. A person, at Edexcel, gallantly retypes the exam papers in Word format and emails them to schools/colleges. It is often more convenient for maths departments to store those papers electronically. He does this typing on a voluntary, after-hours basis and admits that it is easy for mistakes to happen.

Related discussions

Latest

Trending

Trending

Articles for you