## math456 3 years ago Need help..

1. math456

2. math456

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

3. math456

@Hero

4. Hero

I have no clue what \(signum\) is

5. Hero

But graphing it doesn't seem difficult

6. math456

In mathematics, the sign function or signum function (from signum, Latin for "sign") is an odd mathematical function that extracts the sign of a real number. In mathematical expressions the sign function is often represented as sgn.

7. Hero

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

8. Hero

|dw:1347738183297:dw|

9. math456

|dw:1347738213571:dw|

10. math456

yea got it..

11. Hero

Yes, yours is more precise.

12. Hero

Good job

13. math456

thanks.

14. Hero

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

15. math456

Its part of Calculus..

16. Hero

Maybe I have seen it before but just don't remember too well. I don't think this is my first time seeing it. Just been a while and I don't think we went over sgn function in any detail at all.

17. Hero

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

18. math456

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

19. math456

basically the main focus is on limits

20. Hero

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

21. Hero

|dw:1347738443330:dw|

22. math456

hmmm to represent x=0

23. Hero

Yeah, I just drew it for you

24. math456

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