Is discrete time convolution possible? 

Give answer in True/False.

If L^-1{F(s)} = f(t), what is the value of L^-1{F(as)}?

Find the Fourier transform of ∂²u/∂x².

Find the Nyquist sampling rate for the signal x(t) = sinc(200t) * sinc(500t)

Find the impulse response of the differential equation 2y(t) + dy/dt = x(t)

The given signal x(n) = cos[(2π/3)n u(n)] is

Is the signal X[n] = 2cos(2n) periodic or not?

Degaussing in a picture tube means

When are LTI (Linear Time-Invariant) systems stable?

What is the time reversal property of Fourier series coefficients?