## Math4Life 3 years ago Evaluate the infinte geometric series.

1. Math4Life

$\sum_{n=1}^{\infty} (-1/2 )^{n-2}$

2. Ket-kat

Okay, this is an infinite solution since the top is your upper limit and the bottom is the lower limit

3. Ket-kat

so, -1/2^1-2 and so on - all the way to infinity - is going to be your answer

4. Math4Life

$\sum_{n=1}^{\infty} 3(0.4)^{n-1}$

5. Math4Life

that also and thanks keep explaining

6. Math4Life

1. -1/2^1-2 all the way to infinity (my answer for number 1?)

7. Ket-kat

Same thing for this equation. Replace the n with the lower limit (1) all the way to infinity. You don't have to show the work up to infinity, just lead up to it

8. Math4Life

@Ket-kat so what would that be for number 2?

9. Ket-kat

?

10. Math4Life

@Ket-kat whats the answer for 1 and 2, i'm confused.

11. 15Trev

hate that stuff

12. Math4Life

@15Trev can you still help me though?

13. Ket-kat

Okay Like I said. In both equations on the left side of the stigma, replace the n with: 1,2,3,4,5,6,7,8,9,10.......... infinity And solve the equations :)

14. 15Trev

i think so

15. Math4Life

Thanks

16. Ket-kat

<3 No worries

17. 15Trev

we did this last chapter

18. Ket-kat

FLVS? I'm doing it now xD

19. Math4Life

Nice so its fresh for you

20. 15Trev

k

21. 15Trev

so first u have to know that whats in parenths is ur rate

22. 15Trev

multiply parenths by # next to them

23. Math4Life

1. $\sum_{n=1}^{\infty} (-1/2)^{n-1}$ 2. $\sum_{n=1}^{\infty} 3(0.4)^{n-1}$

24. 15Trev

like 3x.4

25. Math4Life

=12

26. 15Trev

no

27. 15Trev

.4

28. Math4Life

29. 15Trev

ya

30. 15Trev

now take 1 and subtract by # in ( )

31. 15Trev

like 1-.4

32. Math4Life

.6

33. 15Trev

forget everythng i said

34. Math4Life

*easily erases everything you said from brain*

35. Math4Life

@15Trev soooooo...?

36. 15Trev

wait

37. 15Trev

k lets do #2

38. Math4Life

39. 15Trev

later

40. Math4Life

ok

41. 15Trev

remember everything i siad erlier actualy

42. Math4Life

WTF.. ok lol :)

43. saifoo.khan

wtf = wow, that's fantastic.

44. Math4Life

@saifoo.khan exactly

45. saifoo.khan

Totally.

46. 15Trev

u can leave now

47. 15Trev

wats 1-.4

48. Math4Life

.6

49. Math4Life

@15Trev its .6

50. 15Trev

just get someone else to do it

51. 15Trev

i forget

52. Math4Life

@15trev nobody else is helping

53. 15Trev

well if i brought home my book i would know

54. 15Trev

do u hav the formula

55. Math4Life

No :/

56. Math4Life

@15Trev i just turned it in without those answers :/

57. 15Trev

what do u mean

58. 15Trev

i goota take a poop brb

59. Math4Life

@15Trev nvm just ill send u a link to my new question

60. 15Trev

k

61. Math4Life

@15Trev can u oovoo?

62. 15Trev

not now

63. Math4Life

@15Trev why?

64. 15Trev

the person im babysitting is right here

65. 15Trev

66. Math4Life

@15Trev ur not babysitting ur bro? and im in the middle of posting it

67. 15Trev

no

68. 15Trev

nabor

69. 15Trev

she likes minecraft

70. 15Trev

lol

71. Math4Life

@15Trev lol to bad both servers we like r down

72. 15Trev

ya

73. Math4Life

@15Trev so when r u done babysittin?

74. 15Trev

730

75. Math4Life

@15Trev I gotta mow the lawn, so later we can oovoo

76. 15Trev

k just finished babysittin