Dicrete Signal Problem, calculation and representation

[bassman83]

Dear All,

I have a problem regarding 2 signals and the depicting of these:
signal 1)
x[n] = (1/2)^n u[n]
signal 2)
x(t) = 2u(t-1)-u(t-3)+δ(t+1)

i would like to sketch x[n] and x(t)

u[n] i think represent a unit step, which = is defined as 0 fo t ,0 and 1 for t>0.
δ = impuls which is 1 for t=0 and else 0.

how do i approach this problem? Must i divide the sum into seperate functions? Odd and even functions?

Please let me know.

[ankit666]

its simple

the first function is a digital function
plotit by obtaining different values of n

the second is continuous ,
make cases for unit step functions , and delta function is at -1 , represent it with a line at y axis with arrow

[Hamlet]

This is an old topic, but yes - drawing the unit step and delta functions out separately helps to grasp the sketching process.