Math4Life
Evaluate the infinte geometric series.
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Math4Life
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\[\sum_{n=1}^{\infty} (-1/2 )^{n-2}\]
Ket-kat
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Okay, this is an infinite solution since the top is your upper limit and the bottom is the lower limit
Ket-kat
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so,
-1/2^1-2 and so on - all the way to infinity - is going to be your answer
Math4Life
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\[\sum_{n=1}^{\infty} 3(0.4)^{n-1}\]
Math4Life
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that also and thanks keep explaining
Math4Life
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1. -1/2^1-2 all the way to infinity (my answer for number 1?)
Ket-kat
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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
Math4Life
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@Ket-kat so what would that be for number 2?
Ket-kat
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?
Math4Life
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@Ket-kat whats the answer for 1 and 2, i'm confused.
15Trev
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hate that stuff
Math4Life
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@15Trev can you still help me though?
Ket-kat
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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 :)
15Trev
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i think so
Math4Life
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Thanks
Ket-kat
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<3 No worries
15Trev
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we did this last chapter
Ket-kat
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FLVS? I'm doing it now xD
Math4Life
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Nice so its fresh for you
15Trev
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k
15Trev
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so first u have to know that whats in parenths is ur rate
15Trev
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multiply parenths by # next to them
Math4Life
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1. \[\sum_{n=1}^{\infty} (-1/2)^{n-1}\]
2. \[\sum_{n=1}^{\infty} 3(0.4)^{n-1}\]
15Trev
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like 3x.4
Math4Life
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=12
15Trev
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no
15Trev
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.4
Math4Life
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3x.4= 1.2 my bad
15Trev
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ya
15Trev
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now take 1 and subtract by # in ( )
15Trev
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like 1-.4
Math4Life
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.6
15Trev
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forget everythng i said
Math4Life
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*easily erases everything you said from brain*
Math4Life
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@15Trev soooooo...?
15Trev
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wait
15Trev
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k lets do #2
Math4Life
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What about 1?
15Trev
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later
Math4Life
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ok
15Trev
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remember everything i siad erlier actualy
Math4Life
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WTF.. ok lol :)
saifoo.khan
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wtf = wow, that's fantastic.
Math4Life
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@saifoo.khan exactly
saifoo.khan
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Totally.
15Trev
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u can leave now
15Trev
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wats 1-.4
Math4Life
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.6
Math4Life
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@15Trev its .6
15Trev
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just get someone else to do it
15Trev
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i forget
Math4Life
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@15trev nobody else is helping
15Trev
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well if i brought home my book i would know
15Trev
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do u hav the formula
Math4Life
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No :/
Math4Life
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@15Trev i just turned it in without those answers :/
15Trev
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what do u mean
15Trev
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i goota take a poop brb
Math4Life
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@15Trev nvm just ill send u a link to my new question
15Trev
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k
Math4Life
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@15Trev can u oovoo?
15Trev
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not now
Math4Life
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@15Trev why?
15Trev
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the person im babysitting is right here
15Trev
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post link to new q
Math4Life
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@15Trev ur not babysitting ur bro? and im in the middle of posting it
15Trev
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no
15Trev
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nabor
15Trev
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she likes minecraft
15Trev
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lol
Math4Life
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@15Trev lol to bad both servers we like r down
15Trev
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ya
Math4Life
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@15Trev so when r u done babysittin?
15Trev
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730
Math4Life
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@15Trev I gotta mow the lawn, so later we can oovoo
15Trev
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k just finished babysittin