A couple questions:
1)Consider the transformation T from R^2 to R^3 given by T [x1, x2] = x1[1, 2, 3] + x2[4, 5, 6]. Is this transformation linear? If so, find its matrix. Note: these matrices are vertical, I just didn't know how to type them vertically.
2)Find an n x m matrix A such that Ax = 3x, for all x in R^n. Note: x is a vector, I just didn't know how to put a vector arrow above it.