A periodic function f(x) defined in the interval (0, 2) as: f(x) = x, for 0 < x < 1 f(x) = 2 - x, for 1 < x < 2 is expanded in a Fourier series of the form: f(x) = a0/2 + ∑n=1∞ an cos(nπx/l) + ∑n=1∞ bn sin(nπx/l) Which of the following statements regarding its coefficients is incorrect?

For the function f(x) = x2 defined on -π ≤ x ≤ π, if its Fourier series expansion is f(x) = a02 + ∑n=1∞ (an cos(nx) + bn sin(nx)), then the values of the Fourier coefficients a0, an, and bn are:

In the Fourier series expansion of a periodic function f(x) over an interval of length 2K (period T = 2K), which term correctly represents the argument of the trigonometric functions?