Given that z = 1 + i √ 2, express in the form a + ib each of the complex numbers
p = z + 1/z, q = z − 1/z. In an Argand diagram, P and Q are the points which represent p and q respectively, O is the orgin, M is the midpoint of PQ and G is the point on OM such that OG =
2 3
OM. Prove that angle PGQ is a right angle.