Qualification > Math

Need help in C4 vectors

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T.Q:
The line l1 has vector equation

r = 8i + 12j + 14k + t(i + j – k),

where t is a parameter.

The point A has coordinates (4, 8, a), where a is a constant. The point B has coordinates
(b, 13, 13), where b is a constant. Points A and B lie on the line l1.

(a) Find the values of a and b.
(3)

Given that the point O is the origin, and that the point P lies on l1 such that OP is
perpendicular to l1,

(b) find the coordinates of P.
(5)


i need help in part B  with explanation plz

Amr Fouad:
Sorry Cant help ya :(

I am still doing my A-Ls this year..

Maybe Astar or nid can  :(

T.Q:

--- Quote from: ~ A.F ~ on April 20, 2010, 10:58:44 am ---Sorry Cant help ya :(

I am still doing my A-Ls this year..

Maybe Astar or nid can  :(

--- End quote ---

no problem

i will wait for them :)

nid404:
Can u post your answers for the first part...

T.Q:

--- Quote from: nid404 on April 20, 2010, 11:03:29 am ---Can u post your answers for the first part...


--- End quote ---

a=18

b=9

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