1. The problem statement, all variables and given/known data is vector b in the span of vectors v1,v2? Give reasons. 2. Relevant equations 3. The attempt at a solution v1=(1,4,0,-1) v2=(2,7,-2,-3) b= (-1,-1,7,4) set up in matrix (v1,v2| b) and after row reduction I have (1,0,0,0),(2,-1,0,0)|(-1,3,6,6) matrix has no sltn since 0x + 0y = 6 therefore b does not span v1 ,v2. my row reduction steps are.. R4= R4+R1 R2=R2-4R1 R4=R4+R2 R3=R3+R1 ..... is this right?