Show that the four points P, Q, R, S with position vectors p,q,r,s respectively such that 5p-2q+6r-9s=0 are coplanar. Also, find the position vector of the point of intersection of the line segments PR and QS.

Mixed-up sentence exercise

  
Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.