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)

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)

anonymous · Answer

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

anonymous · Answer

but like how do u alternate the negative signs?

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

you are welcome

directrix · Answer

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

anonymous · Answer

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

anonymous · Answer

I seriously dont think i need the sum

anonymous · Answer

cuz like it never showed that in my book

anonymous · Answer

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

anonymous · Answer

hehe the angel came to visit me :DDDD

anonymous · Answer

Thanks Guys :DDDD

anonymous · Answer

$ \huge :) $

anonymous · Answer

Angel u gotta teach me latex i dont know it

anonymous · Answer

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

anonymous · Answer

$$\huge :D$$

anonymous · Answer

hehe it worked