If we were given another vector →A4, the rank of the set of the vectors \({\overrightarrow{A}}_{1},\ {\overrightarrow{A}}_{2},\ {\overrightarrow{A}}_{3},{\overrightarrow{A}}_{...If we were given another vector →A4, the rank of the set of the vectors →A1,→A2,→A3,→A4 would still be 3 as the rank of a set of vectors is always less than or equal to the dimension of the vectors and that at least →A1,→A2,→A3 are linearly independent.