A straight line is given by

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

Problem

\mathbf{r}=(1+t)\mathbf{i}+3t\mathbf{j}+(1-t)\mathbf{k}

, where

t\in\mathbb{R}

. If this line lies in the plane

x+y+cz=d

, then the value of

c+d

is: (1)

-1

(2)

1

(3)

7

(4)

9