I just found 2 ways to express OQ & then equated it to find Lambda. My working is a bit different to Hughmaster.
PQ = kPC
OQ - OP = k(OC - OP) [Note: Head minus tail - both sides]
= kOC - kOP + OP
= kOC - OP(k-1)
Therefore, OQ = kOC - 2/3OA(k-1) [Note: OP =...