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For part a is it? |dw:1347737932933:dw|

I have no clue what \(signum\) is

But graphing it doesn't seem difficult

I think that maybe they mean this:
|dw:1347738110746:dw|

|dw:1347738183297:dw|

|dw:1347738213571:dw|

yea got it..

Yes, yours is more precise.

Good job

thanks.

What exactly are you stuyding? I've never seen sgn function before.

Its part of Calculus..

It's possible that it was maybe addressed in the calc book but our teacher never went over it.

yea I understand its okay, i will try to figure this one out

basically the main focus is on limits

I think you should include a line in-between to represent x = 0

|dw:1347738443330:dw|

hmmm to represent x=0

Yeah, I just drew it for you

alright thank you, i will ask my prof to help me with this one!