If ¯a,¯b,¯c are non coplanar vectors and λ∈R then ¯a+2¯b+3¯c,λ¯b+4¯c and (2λ−1)¯c are non coplanar for
If ¯a,¯b,¯c are non collinear, non coplanar vectors and x¯a+¯b,x¯b+¯c,x¯c+¯a are coplanar vectors then the value of x is