2. Suppose A is a matrix with m rows and n columns for which every entry is 1. Explain what the rank and nullity of A are. Your answers might depend on n and/or m...

Consider the matrix A=[2314]. Show that any of the three types of elementary row operations can be used to create a leading 1 at the top of the first column. Which do you prefer and why?

Take this test to review the material in Chapters 4 and 5. After you are finished, check your work against the answers in the back of the book. Determine whether the columns of matrix A span R4. A=[1210130200111001]