This is an advanced maths question and I have no idea how to approach it.?

a1, a2 and a3 are vectors.
a1={5,-5,3,1}, a2={0,-2,-1,-4}, a3={0,0,-3,}
Question is to find a linear equation in [x,y,z,u] where the solution coincides with span{a1,a2,a3}.

Please help!!
Update: a1, a2 and a3 are vectors.
a1={5,-5,3,1}, a2={0,-2,-1,-4}, a3={0,0,-3,3}
Question is to find a linear equation in [x,y,z,u] where the solution coincides with span{a1,a2,a3}.

Please help!!
2 answers 2