Question

Sequences: Find a formula for S_n where n is greater or equal to 1:
(1/2),-(1/4),(1/6),-(1/8),(1/10)

Answer 1

well like i kind of got it lol but most probably its wrong:
(1/n)*(1/2)

Answer 2

but like how do u alternate the negative signs?

Answer 3

(-1)^(n+1)/2n

Answer 4

lol i am soo off. i kind of need to get the hang of it :D
Thanks

Answer 5

you are welcome

Answer 6

@ MarinaDL -->Doesn't S_n mean the sum of the first n terms?

Answer 7

looks like you are right. I didn't read the question carefully and gave only partial answer.

Answer 8

I seriously dont think i need the sum

Answer 9

cuz like it never showed that in my book

Answer 10

Sum will approach +0, but I hope pippa right and it's the correct answer.

Answer 11

hehe the angel came to visit me :DDDD

Answer 12

Thanks Guys :DDDD

Answer 13

\( \huge :) \)

Answer 14

Angel u gotta teach me latex i dont know it

Answer 15

haha sure :)
I aint so great in LaTeX still i can help with whatever i know :D

Answer 16

\[\huge :D\]

Answer 17

hehe it worked