Note that the first two columns of B are the same as those of A, while the third column of B is the sum of its first two columns. (a) Explain why Col(B) = Col(A). (b) Determine the rank of B. (c) Determine the rank of ATB.

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Linear Algebra

In mathematics, problems can be solved by the arithmetic operators like addition, subtraction, multiplication, and division. In algebra, we represent the numbers by any letter called a variable. If these variables are of degree 1, then it is studied under linear algebra. The first-degree equations involving algebraic expressions are called linear equations. That is, if you represent it by drawing a graph you will get a straight line.