sidebar interaction. Press tab to begin. Recall that a vector is in the column space of a matrix A if and only if it can be written as a linear combination of the columns of A. Use this fact and first bullet point in the Theorem to answer the following question: True/False: A vector \mathbf{b} is a linear combination of the columns of a matrix A if and only if the equation A \mathbf{x} = \mathbf{b} has at least one solution