Question

how do i show that two lines in 3D are the same?

Answer 1

L1 : x = 1 + 3t, y = −2 + t, z = 2t
L2 : x = 4 − 6t, y = −1 − 2t, z = 2 − 4t

Answer 2

do i equate the 2 xs , the 2 ys, and the 2 zs
like
1+3t=4-6t
9t=3
t=1/3

x=1+3(1/3)==>x=2
x=4-6(1/3)===>x=2

y=-2+(1/3)==>y=-5/3
y=-1-2(1/3)==>y=-5/3

and
z=2(1/3)==>z=2/3
z=2-4(1/3)==>z=2/3

i think thats the way it shd be done....

Answer 3

@welshfella

Answer 4

looks good to me

Answer 5

you have shown that the x , y and x values are same

Answer 6

ok thanks