Thread: Position vectors

PQRS is a parraellelogram. The postion vectors of P,Q,R and S are , respectively:
p=-3k, q=i+yj, r=5i+2xj+k and s=yi-2k.
The values of x and y are?

Originally Posted by johnsy123

PQRS is a parraellelogram. The postion vectors of P,Q,R and S are , respectively:
p=-3k, q=i+yj, r=5i+2xj+k and s=yi-2k.
The values of x and y are?

Draw a diagram. Get an expression for the vectors PQ and SR. Equate them and hence get two equations in x and y. Solve simultaneously.

If you need more help, please show all your work and say where you get stuck.