Part b
Determine the condition on \(a, b, c, p, q, r\) such that the intersection point \((3, 1, 7)\) from part (a) lies on line 3. Express your answer in terms of \(a, b, c, p, q, r\) and consider cases where \(p, q,\) or \(r\) might be zero. Explain the meaning of this condition in […]