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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:10:01
the answer is $\frac{4!}{2!}$ but i don't get why
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TeXit
04/02/2022 11:10:03
**PixelWolf**
https://cdn.discordapp.c…829948694546.png
399567829948694546.png
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PristineWolf
04/02/2022 11:10:16
my teacher just spoonfed this to me
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:10:42
Well, think of it this way
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Remavas
04/02/2022 11:10:51
Is MOON any different from MOON
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399,567,829,948,694,500
PristineWolf
04/02/2022 11:10:55
no
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:11:15
and I know that since the letter is repeated twice i divide by 2!
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:11:25
but hang on a moment
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:11:36
Brainfart (on my side), but yes, you can't tell the difference whether it's the first or second O
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:11:56
can you please tell me which one of these "general" formula did we use
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help-10
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PristineWolf
04/02/2022 11:12:00
https://cdn.discordapp.c…7700/unknown.png
unknown.png
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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PristineWolf
04/02/2022 11:12:06
that's what bugging me
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5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:12:24
twice
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:12:37
4! - how many ways can I arrange 4 letters
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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PristineWolf
04/02/2022 11:12:42
yes
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:12:44
2! - how many ways can I arrange the two Os
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:13:01
okay i agree
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:13:06
We divide 4! by 2! because we actually don't care whether it's the first or second O
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:13:14
OOMN is the same as OOMN
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:13:41
okay I see
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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PristineWolf
04/02/2022 11:13:52
but which one is it out of the four main formulae ^^
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5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:14:11
@illuminator3 stop deleting messages 😢
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:14:21
or is there a different one for this question
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:14:24
permutation without repetition
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:14:38
so this?
https://cdn.discordapp.c…5259/unknown.png
unknown.png
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:15:14
but I would suggest not trying to blindly apply it to every situation
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help-10
5ca4ada5a24a49f78294eb34074c2bca
391,270,706,186,420,200
illuminator3
04/02/2022 11:15:16
I always think that what I'm saying is correct, then that it's incorrect, and then that it's correct again lol
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help-10
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Remavas
04/02/2022 11:15:23
😄
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:15:40
yeah so basically this doesn't always work?
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:15:57
you just have to know what you're calculating
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:15:59
and there's no general form for the question I got asked
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:16:01
yeah I know
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:17:04
If all you had to ever do was plug in numbers into formulas
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:17:08
math would be pretty boring
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:17:10
don't you think
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help-10
5ca4ada5a24a49f78294eb34074c2bca
391,270,706,186,420,200
illuminator3
04/02/2022 11:18:16
if all you had to ever do was apply logic, math would be pretty boring
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:18:33
no misquotes please
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help-10
5ca4ada5a24a49f78294eb34074c2bca
391,270,706,186,420,200
illuminator3
04/02/2022 11:18:40
didn't mean to put that in quotes
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help-10
5ca4ada5a24a49f78294eb34074c2bca
391,270,706,186,420,200
illuminator3
04/02/2022 11:18:41
my bad
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:19:03
And I mean you *can* generalize it
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:20:10
but my point was that if I want to later revise for my midterm and don't have time to redo every exercise, and if i forget this exists (oh boy did we account for too many _possibilities_) then I'll be screwed because I don't have a general form to remember
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help-10
5ca4ada5a24a49f78294eb34074c2bca
373,884,980,977,336,300
Remavas
04/02/2022 11:21:38
Very easy. Know what you are calculating. If you do 4!, you account for all possible combinations of the four letters, considering that each combination is unique.
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Remavas
04/02/2022 11:21:45
In your case, that is clearly not true.
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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PristineWolf
04/02/2022 11:21:58
how
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help-10
5ca4ada5a24a49f78294eb34074c2bca
399,567,829,948,694,500
PristineWolf
04/02/2022 11:22:33
I know how but like I would want a neat generalization to use for later
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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Remavas
04/02/2022 11:23:20
https://www.ck12.org/book/ck-12-basic-probability-and-statistics-concepts/section/2.4/
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PristineWolf
04/02/2022 11:25:27
ily
1
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Remavas
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help-10
5ca4ada5a24a49f78294eb34074c2bca
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PristineWolf
04/02/2022 11:25:36
@Remavas thanks a lot
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PristineWolf
04/02/2022 11:26:45
i'm closing this and will ask again if anything stumbles me, thanks
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PristineWolf
04/02/2022 11:27:01
.close
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help-10
5135cfee4b29426091656ec0f25a572d
900,480,876,314,492,900
PT
04/02/2022 11:28:13
how can i find a 95% confidence interval for the true mean?
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help-10
af2bcf29715449f0bf6d36b450f288e7
323,045,915,332,050,940
Solitary
04/02/2022 13:47:22
can anyone help me with this problem? Normal simplification is not feasible. Is there any nice way to solve it?
https://cdn.discordapp.c…_11.14.57_PM.png
Screenshot_2022-04-02_at_11.14.57_PM.png
1
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help-10
af2bcf29715449f0bf6d36b450f288e7
719,253,347,147,972,600
aliciaxd
04/02/2022 14:57:55
I think you should isolate the common part
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help-10
07d727343edc4aa4aae714535dfec4d8
766,126,766,589,739,000
Moony
04/02/2022 15:20:15
Hi, I'm having a lot of trouble with this question, I don't really know what to do at all
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help-10
07d727343edc4aa4aae714535dfec4d8
766,126,766,589,739,000
Moony
04/02/2022 15:20:17
https://cdn.discordapp.c…20402-121501.jpg
Screenshot_20220402-121501.jpg
1
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:21:47
you can find out r
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:21:55
by dividing volume by h
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:21:58
and solving for r
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:22:08
80pi=pir²*h
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:22:32
16pi=pir² what will r be?
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PristineWolf
5286
PixelWolf
false
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help-10
07d727343edc4aa4aae714535dfec4d8
766,126,766,589,739,000
Moony
04/02/2022 15:22:47
4?
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:22:56
yes
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help-10
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766,126,766,589,739,000
Moony
04/02/2022 15:22:58
Do you then apply that to the surface area?
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help-10
07d727343edc4aa4aae714535dfec4d8
485,164,773,647,056,900
Gooaaa
04/02/2022 15:23:01
now u ccan solve surface area
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help-10
07d727343edc4aa4aae714535dfec4d8
766,126,766,589,739,000
Moony
04/02/2022 15:23:10
Oh I see
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help-10
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766,126,766,589,739,000
Moony
04/02/2022 15:23:13
Thank you!
1
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help-10
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Gooaaa
04/02/2022 15:23:16
np
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Moony
04/02/2022 15:23:19
.close
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Remavas
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help-10
a3ab543ba5b448eea83fcdd8fba0ec3a
402,512,679,819,935,740
『Wakame』
04/02/2022 15:37:53
Hello does anyone know how to get the second half of the question?
https://cdn.discordapp.c…20402_203723.jpg
IMG_20220402_203723.jpg
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『Wakame』
04/02/2022 15:38:56
I am not sure because then there's only one angle and one side inside the triangle in ii
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『Wakame』
04/02/2022 15:42:25
Unless the two sides on the right of the triangle = 185km?
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help-10
a3ab543ba5b448eea83fcdd8fba0ec3a
334,482,942,506,041,340
Zybikron
04/02/2022 15:51:13
If that angle is 20, then you know it's complimentary angle on the same line?
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a3ab543ba5b448eea83fcdd8fba0ec3a
334,482,942,506,041,340
Zybikron
04/02/2022 15:51:36
and you can find 2 of the sides since you know the speed of the boat and the time traveled.
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help-10
a3ab543ba5b448eea83fcdd8fba0ec3a
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『Wakame』
04/02/2022 16:02:17
I have that the inside angle is 160 but i only have 1 side since for part 1 it asked for 1 hour after it turned
1
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help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:03:44
What is the variance when the sample of n = 5 scores produces SS=20?
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help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:04:31
From what I understand, I divided SS by the sample.
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help-10
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811,346,890,787,651,600
yuzu0206
04/02/2022 17:04:42
which is 20 / 5
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help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:05:12
So doesnt the variance equal to 4?
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
356,908,116,429,897,700
Kaynex
04/02/2022 17:07:34
Produces SS = 20?
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:07:43
yes
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
760,123,615,446,040,600
Rory
04/02/2022 17:12:40
https://cdn.discordapp.c…3718/unknown.png
unknown.png
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
760,123,615,446,040,600
Rory
04/02/2022 17:13:52
I believe your variance is 20/(5-1) = 5
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:19:33
Do not have to square or square root at the end?
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
760,123,615,446,040,600
Rory
04/02/2022 17:20:59
no
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
760,123,615,446,040,600
Rory
04/02/2022 17:24:11
the square root is the standard deviation and the square is variance which is what you said you are looking for
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
551,269,104,800,104,450
EndTimes
04/02/2022 17:30:35
what is SS
0
1
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:30:55
Ohhh I see
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:31:01
Thank you very much!
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:31:51
sum of squared deviations
1
0
null
null
null
null
null
1,652
help-10
3c61e9635f8848e1a372a583ca493622
811,346,890,787,651,600
yuzu0206
04/02/2022 17:32:03
.close
1
0
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
388,155,532,130,779,140
Scratch
04/02/2022 17:55:21
how would I simplify this?
https://cdn.discordapp.c…9218/unknown.png
unknown.png
1
0
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
296,255,018,900,783,100
levio
04/02/2022 18:01:31
well
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
296,255,018,900,783,100
levio
04/02/2022 18:01:44
what do you know about properties of exponents
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
388,155,532,130,779,140
Scratch
04/02/2022 18:04:12
i know it involves -4^n * 4^-n
1
0
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
388,155,532,130,779,140
Scratch
04/02/2022 18:04:17
but that doesnt simplify right
1
0
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
296,255,018,900,783,100
levio
04/02/2022 18:05:17
uhhh
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
296,255,018,900,783,100
levio
04/02/2022 18:05:20
not exactly
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
296,255,018,900,783,100
levio
04/02/2022 18:05:59
$(-1)^n4^n = (-4)^n$
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
510,789,298,321,096,700
TeXit
04/02/2022 18:06:02
**levio**
https://cdn.discordapp.c…018900783104.png
296255018900783104.png
0
1
null
null
null
null
null
1,653
help-10
602d528cea064727bdeb18561872eaab
388,155,532,130,779,140
Scratch
04/02/2022 18:08:09
so then I get (-1)^2n+1/n?
1
0
null
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null