Alright this seems a pretty easy vector question, just wondering if it's me or the solutions I've got that are wrong.
First I found the line PQ, this is equal to q-p which can easily be calculated to be 2x-10y+2z. The midpoint is just half of this which is x-5y+z.If P and Q are the points with position vectors p = −i+3j+2k and q = i−7j+4k respectively, find the position vector of the mid-point of the line PQ.
In the solutions however they have used p+q to calculate the line PQ, is there something obvious I'm missing?
Thanks in advance to the person who sorts this annoying little problem out for me