The question asks to express the pulse as the sum of singularity functions.

My solution includes -u(t-1) after u(t) eg.
u(t)-u(t-1)+r(t-1)-r(t-2)-r(t-3)+r(t-4)-u(t-5)

I would have thought -u(t-1) should be there to negate u(t) after t=1?

http://netlecturer.com/NTOnLine/T13_SIGNALS/p02SingFns.htm#fivehttp://netlecturer.com/NTOnLine/T13_SIGNALS/p02SingFns.htm#five

 

I would have thought -u(t-1) should be there to negate u(t) after t=1?

No, the step is not negated, this is why the ramp at t=1 starts at a level of 1 (it gets added on top of the step function)
In your solution the function would be dropped back to 0 at t=1, which would mean the ramp would start at 0 at t=1 and rise to 1 at t=2.

 

The question asks to express the pulse as the sum of singularity functions.

My solution includes -u(t-1) after u(t) eg.
u(t)-u(t-1)+r(t-1)-r(t-2)-r(t-3)+r(t-4)-u(t-5)

I would have thought -u(t-1) should be there to negate u(t) after t=1?

http://netlecturer.com/NTOnLine/T13_SIGNALS/p02SingFns.htm#five

Where you get the attached file? I really need the source ;(