If the straight lines and x+1 5 = y+1 2 = z k are coplanar

MATHEMATICS · Single correct · ISC · Mathematics · Three-Dimensional Geometry · Three-Dimensional Geometry

Problem

If the straight lines

\frac{x-1}{2} = \frac{y+1}{k} = \frac{z}{2}

and

\frac{x+1}{5} = \frac{y+1}{2} = \frac{z}{k}

are coplanar, then the plane(s) containing these two lines is/are (1)

y + 2z = -1

(2)

y + z = -1

(3)

y - z = -1

(4)

y - 2z = -1