Let A be a 6 × 5 matrix with linearly independent column vectors a1, a2, a3 and whose remaining column vectors satisfy a4 = a1 + 3a2 + a3, a5 = 2a1 − a3 (a) What is the dimension of N(A)? Explain. (b) Determine the reduced row echelon form of A.

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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.