Determine the value of k for which the direction vectors of the lines

(x-1)/k = (y-2)/2 = (𝑧+1)/ k+1 and (x+3)/-2 = z, 𝑦 = −1 are perpendicular.

5 answers

I assume you know how to find the direction vectors of the two lines.
So make their dot product zero.
ok thanks oobleck
How do you find the direction vectors for the lines?
the direction numbers are the denominators, so <k,2,k+1> and <-2,0,1>
So, you want
-2k + 0 + k+1 = 0
k = 1
Hi, did you multiply both the vector directions? Or what did you exactly do?