- #1
Cudi1
- 98
- 0
Homework Statement
write the vector equation and parametric equation of the line through A(-1,2,1) and B(1,2,1)
Basically I was wondering If i found AB or BA would it be equivalent?
Homework Equations
AB= OB-OA= (1,2,1)-(-1,2,1) = (2,0,0)
BA= OA-OB= (-1,2,1)- (1,2,1) = (-2,0,0)
thus , (x,y,z)= (-1,2,1)+ t(2,0,0)
x=-1+2t
y=2
z=1
The Attempt at a Solution
I solved it at the top but found that AB=-BA, is that correct, and if i wanted to find b/w 2 points would AB=-BA ( as the questions I've dealt with this seems true?)