## Goten77 2 years ago need calculus help y=2x find antiderivative using riemann sum yes i kno its just y = x^2 + c but i need help doing the work..... this is what i got so far below

1. Goten77

|dw:1355372909640:dw|

2. Goten77

i got more

ok that's good what you're doing.

4. Goten77

|dw:1355372991600:dw| forgot to mention a = 0 since its at the middle point and B is some point thats greater then 0

5. Goten77

then i got this but im sure somethings wrong

6. Goten77

|dw:1355373081568:dw|

Whoa,aren't you the one who posed this question Goten77?

8. Goten77

am i doing this right so far?

I mean posted this?

10. Goten77

ye i posted

11. Goten77

so is what i did right so far?

12. abb0t

What is n? I think that is usually given. But if not, then yes. You're on the right path

13. Goten77

|dw:1355373820929:dw|

14. Goten77

hmm if thats right then i get to this part |dw:1355373870543:dw|

15. Goten77

|dw:1355373968636:dw|

16. Goten77

heres where i get lost

17. abb0t

You're "n" should cancel out when you take the limit, you get an actual value.

18. Goten77

hmm something like this u mean?

19. Goten77

|dw:1355374279406:dw|

20. Goten77

must b a really long reply XD

21. abb0t

Oh sorry, haha. Yeah. like that. The N's should cancel :)

22. oldrin.bataku

I wrote a reply but the LaTeX rendering script failed as usual.

23. Goten77

<.<

24. Goten77

hmm maybe this |dw:1355375769697:dw|

25. Goten77

well the right side = 1 but then im left with the anti derivative of y = x and not y = 2x

26. Goten77

<.< should a 2 b on the top from like the start or somethign?

27. abb0t

Well, yeah. Lol. It should. You should have got that from your b-a tho, I believe.

28. Goten77

oh i think i get it now

29. Goten77

|dw:1355375997984:dw|

30. Goten77

|dw:1355376040397:dw|

31. Goten77

hmm this problem took me way to long

32. abb0t

Yeah, reimann sum problems are long. introduction methods to easy methods are always long. just like the definition of the derivative. it' could take a long time.