Flag Vectors> 3D Geometry...
question mark

Find a point on the line (x+2)/3 = (y+1)/2 = (z-3)/2 at a distance of 3*sqrt(2) from the point (1,2,3).

Shalini Rai , 14 Years ago
Grade 12
anser 1 Answers
Likith Narayan ss

 (x+2)/3 = (y+1)/2 = (z-3)/2=k(let)

(x+2)/3=k and (y+1)/2=k and  (z-3)/2=k

given x=3k-2,y=2k-1,z=2k+3 given(x,y,z) is at a distance of 3sqrt2 from(1,2,3)

sqrt(3-3k)+(3-2k)2+(-2k)2=3sqrt2

squaring on both sides

9+9k2-18k+4k2-12k+9+4k2=18

17k2-30k =0

k(17k-30)=0

k=0 ork=17/30

substitute k=0 x=-2,y=-1,z=3 therefore point is (-2,-1,3)

also find point for k=17/30

Last Activity: 13 Years ago
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments