Consider the signals x(t) = u(t – 1) – 2u(t – 2) + u(t – 3) and co x(t) = L x(t – kT), k= -co where T 0. Let ak denote the Fourier series coefficients of x(t), and let X(jw) denote”the Fourier transform of x(t). (a) Determine a closed-form expression for X(jw ). (b) Determine an expression for the Fourier coefficients ak and verify that ak = ~x(i2;k).

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