The period of the signal 14cos(7t) - 6sin(3t) is

Find the value of 2·sgn(0)·d[0] + d[1] + d[45],

where sgn(x) is the signum function.

Find the Nyquist rate of the given signal f(t) = 5 sin 200πt cos 500πt.

If the Laplace Transform of f(t) is F(s), what is the value of L{∫₀^t f(t) dt}?

The function y(t) = log[x(t)] is:

Which of the following is neither a power signal nor an energy signal?

The unit impulse function ∂(t) is _____ of time t.

If L{f(t)} = F(s), then by the initial value theorem, what is the relationship between the limits of f(t) and F(s)?

Consider three signals x(t), y(t), and z(t) with time periods t1, t2, and t3 respectively. Under what conditions are the three signals periodic?

A total of 30 equal-power users are to share a common communication channel by CDMA. Each user transmits information at a rate of 10 kbps via DS spread spectrum and binary PSK. The minimum chip rate to obtain a bit error probability of 10^-6 is: