the question is:
is this set of vectors coplanar?
I am getting an answer of no because I am finding that a+b+c=0 but only if a=b=c=0
and they that would not make them linearly dependent, thus not coplanar
i did a(1,-1,1)+b(0,1,1+c(1,0,2)=0
I went on to try to solve for each letter always coming up with a=b=c=0
the correct answer should be yes they are coplanar though