Vector proof- urgent!!!!?

1 ⤊

Vector proof- urgent!!!!?

Please help me with this Maths question!!!!
"OABC is a regular tetrahedron. M,N,O and P are the midpoints of OA,OB,AC,BC respectively. Let OA=a, OB=b, OC=c. Using vector methods, prove that MQ is perpendicular to NP"

Thanks a lot in advance.

2007-10-30 20:47:34 · 1 answers · asked by coucou_bambie 2 in Science & Mathematics ➔ Mathematics

1 answers

How can O be both a vertex of the tetrhedron and a midpoint of one of the edges? And what is Q?

2007-10-30 21:39:14 · answer #1 · answered by Northstar 7 · 1⤊ 0⤋