periodic signals

Consider a discrete-time periodic signal with period N = 5. Let the discrete-time Fourier series (DTFS) representation be $$x[n] = \sum\limits_{k = 0}^4 {{a_k}{e^{{{jk2\pi m} \over...

Consider the signal $f(t) = 1 + 2 \cos(\pi t) + 3 \sin(\frac{2\pi}{3} t) + 4 \cos(\frac{\pi}{2} t + \frac{\pi}{4})$, where t is in seconds. Its fundamental time period, in seconds,...