How do you determine if a function is periodic or not without graphing it?
For example, cos^2(2pit) is periodic, as is sin^3(2t). But e^(-2t)cos(2pit) is nonperiodic, as is the discrete signal x[n]=cos(2n).
Does this have to do with Fourier series somehow? Is there an easier way to determine it? Thanks for any help.
For example, cos^2(2pit) is periodic, as is sin^3(2t). But e^(-2t)cos(2pit) is nonperiodic, as is the discrete signal x[n]=cos(2n).
Does this have to do with Fourier series somehow? Is there an easier way to determine it? Thanks for any help.