What is the minimum sampling frequency, required to sample the following signal without aliasing: xc() 2 t = sin( ) π ⋅ ⋅ 50 kHz t + 3 2 cos( ) π ⋅ ⋅ 15? Show that if , x n( ) ↔ X z( ) then xn k ( ) –...

What is the minimum sampling frequency, required to sample the following signal without aliasing: xc() 2 t = sin( ) π ⋅ ⋅ 50 kHz t + 3 2 cos( ) π ⋅ ⋅ 15?

Show that if , x n( ) ↔ X z( ) then xn k ( ) – z–k ↔ X z.