## myininaya 5 years ago Maybe I should rewrite my post: can someone pretty please write the first couple of terms for summation(2,i=-1..4)

1. myininaya

$\sum_{i=-1}^{4}2$

2. myininaya

i believe in you cyter :)

3. anonymous

2+2+2+2+2+2=12

4. myininaya

why is it that though?

5. anonymous

-1,0,1,2,3,4, are 6 items

6. myininaya

i might be losing my brain lol or something but why does that tell us to do 2(6)

7. anonymous

i think of it this way sum of 2(i)^0 from i=-1 to 4 = 2(-1)^0+ 2(0)^0+2(1)^0+2(2)^0+2(3)^0+2(4)^0 = 12 if you know something about arithmetic series it should help

8. myininaya

i know but that 0^0 is confusing me because it is undefined

9. anonymous

0^0 is indeterminate this is tricky here

10. myininaya

i have always thought of it just like you said but I never thought about the 0^0

11. anonymous

okay, scratch my method, and check this out http://betterexplained.com/articles/techniques-for-adding-the-numbers-1-to-100/

12. myininaya

i don't know if this helps

13. myininaya

I do thank you though for trying to help me i will give you a medal

14. anonymous

does that help? We are taking the sum of the y values for f[n]=n. at f[-1]+f[0]+...+f[4] a way of visualizing functions might help

15. myininaya

but we have f(n)=2 omg omg ok so we f(-1)+f(0)+f(1)+... =2+2+2+ omg you are my hero

16. myininaya

i never thought of visualing it as a function

17. anonymous

lol, good. Was just about to suggest the f(n) = 2 thing =) Glad you hit upon it.

18. myininaya

:)

19. myininaya

cyter eveytime i notice you post something i'm gonna give you a medal

20. myininaya

i just went back through some old posts and probably gave you like 6 medals lol

21. anonymous

Thanks :)

22. myininaya

like seriously cyter you are my hero

23. anonymous

Lets hope I save more... onto infinity!

24. anonymous

11 medals are enough

25. myininaya

i know alot of math. I didn't think anyone could really impress me on this site or save me.

26. anonymous

one was probably enough

27. anonymous

but its ok

28. myininaya

i mean i exaggerate when i say save lol

29. anonymous

I did exaggerate too

30. myininaya

i have a masters in math but there are small things i just accepted rules on

31. myininaya

its nice to understand

32. anonymous

This is the best thing I like about collaborative learning You get to learn and really reach levels of understanding you couldn't reach

33. myininaya

Polpak is pretty smart and impressive but no one has ever rescued me like you lol

34. myininaya

i'm sorry but i'm going to medal stalk you

35. anonymous

I appreciate it but I'm really interested in understanding concepts in different ways/dimensions thanks to people kind enough to enlighten everyone.

36. anonymous

37. myininaya

lol well it is the only i can do probably to show thanks

38. anonymous

39. myininaya

40. myininaya

41. anonymous

yes

42. anonymous

I'm not sure

43. myininaya

what level of math are you?

44. anonymous

Calc 1

45. anonymous

46. myininaya

omg seriously wow cal 1 omg you are a genius already

47. anonymous

nah

48. anonymous

what math class r u?

49. myininaya

i have my masters in math lol

50. anonymous

u r the genius

51. myininaya

no! i couldn't explain that summation thing up there lol

52. myininaya

i mean now i can

53. myininaya

gn