6.8. EXERCISES 103

34. A point is given along with a line. Find the equation for the plane which contains theline as well as the point.

(a) (1,2,1) ,(1,−1,1)+ t (1,0,1)

(b) (2,1,−1) ,(1,1,1)+ t (2,−1,1)

(c) (−1,2,3) ,(−1,1,1)+ t (2,1,1)

(d) (2,0,1) ,(2,1,1)+ t (−1,1,1)