# Expressing signal as a sum of functions

1. Sep 3, 2014

### abcdefhij

1. The problem statement, all variables and given/known data

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

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

2. Relevant equations

3. The attempt at a solution
I have absolutely no idea how to proceed
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Sep 3, 2014

### Staff: Mentor

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

3. Sep 3, 2014

### FOIWATER

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

4. Sep 3, 2014

### Staff: Mentor

Are you also abcdefhij?

5. Sep 3, 2014

### FOIWATER

No I am not, sorry

6. Sep 6, 2014

### 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

7. Sep 6, 2014

### Staff: Mentor

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.