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Evaluate the infinte geometric series.

Mathematics
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\[\sum_{n=1}^{\infty} (-1/2 )^{n-2}\]
Okay, this is an infinite solution since the top is your upper limit and the bottom is the lower limit
so, -1/2^1-2 and so on - all the way to infinity - is going to be your answer

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Other answers:

\[\sum_{n=1}^{\infty} 3(0.4)^{n-1}\]
that also and thanks keep explaining
1. -1/2^1-2 all the way to infinity (my answer for number 1?)
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
@Ket-kat so what would that be for number 2?
?
@Ket-kat whats the answer for 1 and 2, i'm confused.
hate that stuff
@15Trev can you still help me though?
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 :)
i think so
Thanks
<3 No worries
we did this last chapter
FLVS? I'm doing it now xD
Nice so its fresh for you
k
so first u have to know that whats in parenths is ur rate
multiply parenths by # next to them
1. \[\sum_{n=1}^{\infty} (-1/2)^{n-1}\] 2. \[\sum_{n=1}^{\infty} 3(0.4)^{n-1}\]
like 3x.4
=12
no
.4
3x.4= 1.2 my bad
ya
now take 1 and subtract by # in ( )
like 1-.4
.6
forget everythng i said
*easily erases everything you said from brain*
@15Trev soooooo...?
wait
k lets do #2
What about 1?
later
ok
remember everything i siad erlier actualy
WTF.. ok lol :)
wtf = wow, that's fantastic.
@saifoo.khan exactly
Totally.
u can leave now
wats 1-.4
.6
@15Trev its .6
just get someone else to do it
i forget
@15trev nobody else is helping
well if i brought home my book i would know
do u hav the formula
No :/
@15Trev i just turned it in without those answers :/
what do u mean
i goota take a poop brb
@15Trev nvm just ill send u a link to my new question
k
@15Trev can u oovoo?
not now
@15Trev why?
the person im babysitting is right here
post link to new q
@15Trev ur not babysitting ur bro? and im in the middle of posting it
no
nabor
she likes minecraft
lol
@15Trev lol to bad both servers we like r down
ya
@15Trev so when r u done babysittin?
730
@15Trev I gotta mow the lawn, so later we can oovoo
k just finished babysittin

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