Give an example of a vector perpendicular to [6,2,3] that has the same length.
If the answer was [a,b,c]
a squared + b squared + c squared = 49
this is all i can get so far...
I know for [a,b] and [m,n] to be perpendicular am + bn =0
b/a X n/m = -1
bn = - am
am+bn = 0
Then, would this work for three numbers too?
[a,b,c,] and [ 6,2,3] 6a + 2b + 3c =0