Piecewise definition for a function

[jojo1]

Hi i have been given this function

f(t)= (t-1)u(t)-(t-2)u(t-2)-u(t-4)

and have to write a piecewise definition for it.

the middle part of the function is given me problems.

can anyone assist on what to do

Thanks

Jo

 

[TenaliRaman]

Calculate f(0),f(1),f(2),f(3),f(4),f(5) (i think this should be enough)
Can u see what to do now?

-- AI

 

[Corneo]

Does u(t) simply mean 1 for t => 0 and 0 for t < 0

 

[TenaliRaman]

well i assumed that to be the case,
u(t) is normally the unit step function
(ofcourse i might be doing too much of digital signal processing lately)

-- AI