Hi, I don't know how to approach this question, thanks in advance! =)
Let v be a unit vector and c a real number, and let P be the plane whose equation is r.v = c . Suppose also that is a vector, and A the point whose position vector relative to the origin is .
a) Find in parametric vector form, the equation of the line l that is perpendicular to P and passes through A.
b) Let B be the point of intersection of the plane P and the line l in Part (a). Find a formula for the position vector of B relative to the origin, in t erms of , v and c.