Let f be a 2T-periodic smooth function. Let dN(x) : 1 1 + [cos(x) + cos(2x) +...+ cos(Nx)] || OS for some positive integer N. Show that lim N→∞ f(x)ôN(x)dr = f(0)

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A:

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A: Explanation of the answer is as follows

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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.