Expressing signal as a sum of functions

[abcdefhij]

Homework Statement

V(t) = [2t - 4] u(t) u(4 - t)

I need to express this a sum of step and ramp functions.

Homework Equations

The Attempt at a Solution

I have absolutely no idea how to proceed

 

[NascentOxygen]

What is the meaning of this: u(t-4) ?

 

[FOIWATER]

unit step displaced by four units in time, I believe?

 

[NascentOxygen]

unit step displaced by four units in time, I believe?

Are you also abcdefhij?

 

[FOIWATER]

No I am not, sorry

 

[abcdefhij]

Sorry

Sorry I have been really busy and unfortunately I was not able to reply to your comments soon
enough. Yes, it is unit step time, and I have no idea how to do the question

 

[NascentOxygen]

Sorry I have been really busy and unfortunately I was not able to reply to your comments soon
enough. Yes, it is unit step time, and I have no idea how to do the question

Can you explain in words what features an observer would see in this function: V(t) = 2t

I would need at least 50 words, you may need a few more than that.