Question

Position vector of a point 5 î then the vector is :
A) collinear along X-axis
B) coplanar in XY plane
C) collinear along Y-axis
D) collinear along Z-axis​

Answer 1

Answer:

Correct option is

A

x+y+z=0

As a,b,c are collinear.

Therefore, point c divides AB in a certain ration, say y=x

Therefore by section formula,

c=

y+x

yb+xa

⇒xa+yb=(x+y)c

⇒xa+yb−(x+y)c=0

As xa+yb+zc=0

Therefore x+y+z=0

Answer 2

Answer:

this is right answer this is my second 8d