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C4 Vectors Help

Hiya,

I'm having some real trouble with part b to the question attached. I dont understand why the mark scheme does the vector AB multiplied by the 6i+c-k part of the vector r.

If anyone can explain it to me that would be great!

Relative to a fixed origin O.docx55.7KB

Reply 1

the bear

the equation of the line did not appear in the document.

can you post a link instead ?

Reply 2

LuckyEms

How do i post as a link? O.o

Reply 3

the bear

Original post by LuckyEms

How do i post as a link? O.o

i have found it a suitable link; you just copy and paste like this:

http://www.thestudentroom.co.uk/attachment.php?attachmentid=289948&d=1401318184.

it is question 6

Reply 4

LuckyEms

Yeah thats the paper i got it from, i just cut it down to the question and answer only.

Reply 5

the bear

Original post by LuckyEms

if AB is perpendicular to line L then AB.{the direction of L} = 0

Reply 6

LuckyEms

So is the second part of vector r the direction? Is that always the case with vectors that appear like that?

Reply 7

ChoccyPhilly

Original post by LuckyEms

Hiya,<br />
<br />
I'm having some real trouble with part b to the question attached. I dont understand why the mark scheme does the vector AB multiplied by the 6i+c-k part of the vector r. <br />
<br />
If anyone can explain it to me that would be great!